---
slug: dsip
title: "DSIP (Delta Sleep-Inducing Peptide): the replication record and dosing"
kind: essay
status: published
hash: 8baf539bcf409b17854457477743eba2b38d048f1998f366482709031d9598cf
created: 2026-06-29 08:23:19
updated: 2026-10-08T11:51:22.218Z
summary: "If you are awake at three in the morning and somebody has pointed you at a peptide named after deep sleep, one fact decides most of it. Every strongly positive human sleep result for DSIP came out of the laboratory that discovered the"
tags: ["peptide","dsip"]
above: []
below: []
adjacent: []
nested: []
---
# DSIP (Delta Sleep-Inducing Peptide): the replication record and dosing

*If you are awake at three in the morning and somebody has pointed you at a peptide named after deep sleep, one fact decides most of it. Every strongly positive human sleep result for DSIP came out of the laboratory that discovered the*

If you are awake at three in the morning and somebody has pointed you at a peptide named after deep sleep, one fact decides most of it. Every strongly positive human sleep result for DSIP came out of the laboratory that discovered the molecule. Every independent group that tested it afterwards got nothing, or got something so small they wrote in the paper that it was not worth using.

Take the evidence state first, because it is short. Three blinded, placebo-controlled sleep trials of DSIP have ever been run in people. The one from the Basel laboratory that discovered the molecule, in 14 people with severe long-term insomnia, found a large improvement. The two run by other groups — 16 people in Amsterdam and a crossover in Montevideo — found differences their own authors described in print as weak and of little clinical significance. Across every published study, 250 people have been given DSIP and had a result written down: 61 in the sleep trials that stated their numbers, 174 in two uncontrolled withdrawal series with no placebo arm, eight in the growth-hormone study, and seven in one pain pilot. Two further reports never said how many people they treated. Nobody has ever registered a trial of it: asking ClinicalTrials.gov on 4 August 2026 for delta sleep-inducing peptide, for emideltide, and for DSIP as an intervention returns zero studies each time. The animal record is rabbits, rats, cats and mice, and almost all of it is EEG recordings taken after the peptide was put straight into the brain or into a vein. Four things have never been measured in a person at all: the dose that is actually sold, which is 100 to 300 micrograms under the skin against the 1.5 milligrams into a vein used in every human study; the nasal route; use for longer than a week; and the receptor, because fifty years of looking has not found one.

One disclosure, because it should change how you read the rest. The operator of this site has a commercial interest in compounds described here. That is a reason to weigh what is on this page against the sources it cites rather than against its tone, and every claim below carries the source that supports it for exactly that reason.

That is not a hole in the evidence. It is a pattern in the evidence, and it is the single most useful thing in this file.

The second most useful thing is the count of what happens to people who buy it and inject it. Thirty-five first-hand reports are catalogued here. Eighteen say sleep got better. Ten say sleep got worse or something unpleasant appeared. Five say nothing at all happened. One says it worked and then stopped. One says one sleep number moved and the others did not. That split — roughly half helped, half not helped or actively worse — is the same answer the controlled trials gave, arrived at independently by strangers on the internet.

DSIP is nine amino acids: Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, molecular weight 849. It was pulled out of the brain blood of rabbits in Basel, Switzerland, in the mid-1970s, by Marcel Monnier and Guido Schoenenberger. Its name — Delta Sleep-Inducing Peptide — was assigned on the strength of one reading: put it into a second rabbit's brain and the slow waves on its EEG got bigger.

The compound is real. The sequence is confirmed. The effect it is named after is the weakest thing about it. What follows is where it came from, what every study found in order, which of its non-sleep effects hold up better than the sleep one, what its two-to-four-minute survival time in blood does to the whole story, and what does have the evidence if what you want is to sleep.

## It came out of a rabbit whose sleep was electrical

Monnier's group in Basel started in 1963 with a cross-circulation question: if you make an animal sleep, does its blood carry something that will make a second animal sleep? Donor rabbits were held in slow-wave sleep by running current through the intralaminar thalamus. Blood coming out of their brains, drawn from the dural venous sinus, was filtered outside the body, and the filtrate was infused into the brain cavities of recipient rabbits. Slow-wave power in the recipients went up.

```widget
{
  "type": "source",
  "id": "w_hroqdqlk"
}
```

By 1977 the active fraction had been purified, sequenced and made synthetically. Schoenenberger and Monnier tested the synthetic nine-residue peptide against five of its own breakdown fragments, two altered versions and a related three-residue peptide, blinded, in 58 rabbits. Only the intact nine-residue version raised delta and spindle activity.

```widget
{
  "type": "source",
  "id": "w_y3chk0t1"
}
```

The 1978 follow-up in 61 rabbits put a number on it: average delta activity about 35% above controls given either vehicle or any of the eight other peptides. The structure had to be exact — shorten the chain by one or two residues, swap an amino acid, or use the beta-aspartyl form instead of the alpha, and the effect weakened or disappeared.

```widget
{
  "type": "source",
  "id": "w_1v4zebwc"
}
```

## Four things about that method have never been answered

- **The donor rabbits were not asleep in any normal sense.** Their sleep was produced by passing current through a piece of brain. Whatever turned up in that blood is the product of electrically stimulating the thalamus, which is a different claim from a molecule that builds up during ordinary sleep.
- **What was measured was a waveform, not sleep.** Delta-band amplitude in a near-anaesthetised preparation is a signal on a screen. Nothing in the original work showed a recipient animal sleeping longer or better by any behaviour you could watch.
- **The dose curve is a hump, not a slope.** Schoenenberger reported bell-shaped curves with different peaks by route, and Scherschlicht's group at Roche found the same hump in rabbits, cats and mice. A compound with a hump-shaped curve is close to impossible to disprove: any failed replication can be blamed on landing on the wrong side of the peak.
- **No gene, no precursor, no receptor.** The sequence exists. The biological machinery that would build it and read it does not.

```widget
{
  "type": "source",
  "id": "w_6nqi6ir3"
}
```

```widget
{
  "type": "source",
  "id": "w_lklbxmce"
}
```

## The replication record, study by study

| Year | Investigators | Subjects | n | Design | Sleep result |
|---|---|---|---|---|---|
| 1977 | Schoenenberger, Monnier (Basel) | Rabbits, into the brain cavity | 58 | Blinded, against 8 related peptides | Delta and spindle EEG significantly raised; only the intact nine-residue peptide did anything |
| 1978 | Schoenenberger et al. (Basel) | Rabbits, into the brain cavity, 6 nmol/kg | 61 | Blinded, against vehicle and 8 peptides | Average delta activity +35% against controls |
| 1980 | Tobler, Borbély (Zürich) | Rats, into the belly 40–160 nmol/kg; into the brain cavity 7–24 nmol | Not stated | Controlled, EEG and movement | **No significant rise in sleep or delta power.** Delta power *fell* after 7 nmol into the third ventricle |
| 1981 | Schneider-Helmert, Schoenenberger (Basel) | Long-term insomniacs, into a vein, 25 nmol/kg | 6 | Open label, one dose | Longer sleep, fewer interruptions, slightly more REM; a mild *waking-up* effect in the first hour |
| 1984 | Kaeser (Basel) | Severe insomnia, 10 injections | 7 | Open label, no control group | Sleep "normalised" in 6 of 7 across 3–7 months |
| 1984 | Scherschlicht et al. (Roche) | Rabbits, cats, morphine-dependent mice | Not stated | Controlled | Light non-REM up in rabbits; REM up in cats; hump-shaped dose curve throughout |
| 1986 | Schneider-Helmert (Basel) | Long-term insomniacs, 6 × 30 nmol/kg into a vein over one week | 18 | Sleep laboratory, no placebo arm | Sleep normalised by the end of the follow-up week |
| 1987 | Schneider-Helmert (Basel) | Severe long-term insomnia, 7 nights running | 14 | Blinded, placebo-controlled | Large improvement in night sleep and daytime performance; the effect carried into a post-treatment placebo night |
| 1987 | Monti et al. (Montevideo) | Long-term insomniacs, into a vein, 25 nmol/kg, 4 nights | Not stated | Blinded crossover | **Difference against placebo not significant** once the starting point was accounted for. "Sleep improvement under DSIP treatment is of little clinical significance" |
| 1988 | Iyer, Marks, Kastin, McCann (Dallas) | Rats, kept awake on a rotating wheel | Not stated | Antibody blockade | The rise in slow-wave sleep and growth hormone after deprivation was blocked by anti-DSIP antiserum |
| 1992 | Bes, Hofman, Schuur, Van Boxtel (Amsterdam) | Long-term insomniacs, into a vein, 25 nmol/kg × 3 nights | 16 (8 per arm) | Blinded, matched pairs, parallel groups | Sleep efficiency and time-to-sleep improved, **but the effects were "weak and in part could be due to an incidental change in the placebo group"**; no change in how the sleep felt. "Not likely to be of major therapeutic benefit" |
| 1992 | van Kammen et al. (Pittsburgh) | Drug-free schizophrenic volunteers, spinal fluid assay | 15 | Observational correlation | DSIP-like material in spinal fluid tracked stage 3 and delta sleep |
| 2006 | Kovalzon, Strekalova (Moscow) | Review | — | — | "The hypothesis regarding DSIP as a sleep factor is extremely poorly documented and still weak" |

```widget
{
  "type": "source",
  "id": "w_jrk3aijc"
}
```

```widget
{
  "type": "source",
  "id": "w_pkhu2ho3"
}
```

```widget
{
  "type": "source",
  "id": "s2"
}
```

## Sort that table by laboratory and the pattern jumps out

Every strongly positive human result came from Basel — Schneider-Helmert, working alongside Schoenenberger, who isolated the peptide in the first place. Every group that tested it without that connection got a null or a triviality.

Tobler and Borbély in Zürich concluded flatly that the compound does not qualify as a sleep-promoting substance. Monti in Montevideo found the placebo comparison fall apart once the starting point was accounted for. Bes in Amsterdam found statistically real but weak effects, warned that part of the signal came from drift in the placebo group, and advised against using it.

Three more facts compress the record further.

Nearly every human study used the same single dose, 25 nmol/kg into a vein. No dose-finding study was ever run in a person. Against a hump-shaped dose curve, testing one rung of the ladder over and over cannot rule the compound in or out. It can only tell you about that rung.

Every human study injected into a vein. The subcutaneous shot that is the entire present-day market has never been tested in a human sleep trial.

And the total number of people ever randomly assigned to DSIP against placebo for sleep, in the whole fifty-year literature, is under forty.

## In fifty years nobody has registered a trial of it

Asking the ClinicalTrials.gov registry on 4 August 2026 for "delta sleep-inducing peptide" returns zero studies. Asking for "emideltide" returns zero. Asking for DSIP as a registered intervention returns zero.

```widget
{
  "type": "source",
  "id": "w_z711kz2m"
}
```

Not an ongoing trial. Not a completed one. Not a terminated one. Not a withdrawn one. In fifty years, nobody has registered an attempt to settle the question the compound is named after.

## The biggest human numbers in the file are about withdrawal, not sleep

In 1983 Dick, Grandjean and Tissot in Geneva gave DSIP into a vein at 25 nmol/kg, as the only treatment, to 67 patients going through withdrawal — 28 from alcohol, 39 from opiates. Twenty-seven per cent were lost or unsuitable to assess. Of the 49 who could be assessed, 48 were reported to benefit, with the physical signs settling immediately and staying settled. Anxiety took longer.

```widget
{
  "type": "source",
  "id": "w_ee6vmdc4"
}
```

The 1984 extension enrolled 107 inpatients, 47 in alcohol withdrawal and 60 in opiate withdrawal. Symptoms vanished or improved markedly in 97% of the opiate cases and 87% of the alcohol cases. Opiate patients needed more injections and took longer. It was well tolerated apart from headache in a few people.

```widget
{
  "type": "source",
  "id": "w_0vnryw2z"
}
```

An independent open trial of DSIP for coming off opioids was published by Backmund's group in Munich in 1998.

```widget
{
  "type": "source",
  "id": "w_5aputa1e"
}
```

Every one of those is an uncontrolled series. No placebo. No blinding. Doctors and nurses rating the outcome. And between 13% and 27% of the people enrolled dropped out of the analysis after the fact.

Here is why that matters more than usual. Acute withdrawal is a syndrome that ends by itself over a few days whether or not you give anything. An open series in a self-limiting syndrome measures the passage of time. Two hundred people getting better on schedule tells you almost nothing that one person getting better on schedule does not.

The reasoning behind the withdrawal work is at least specific and testable. Tissot had shown that morphine, alcohol, pentobarbital and DSIP all produced spindle-heavy slow-wave sleep when injected into the bulbo-mesencephalo-thalamic recruiting system, and that naloxone — the opioid blocker — reversed all four. Young and Key confirmed that reversal independently in rats: DSIP into the lateral ventricle raised REM and non-REM sleep, and pre-treating with naloxone at a dose that hits the mu-opioid receptor blocked it.

```widget
{
  "type": "source",
  "id": "w_xwm13uhv"
}
```

That is the strongest mechanical thread in the whole file, and note what it points at: an interaction with the opioid system, not a sleep factor.

## Seven patients, four different conditions, no control group

The chronic pain evidence is one pilot study. Larbig and colleagues treated seven people — migraine and vasomotor headache, long-term tinnitus, and psychogenic pain attacks — with DSIP into a vein on five days running, then five more injections every 48 to 72 hours. Pain fell significantly in six of the seven against each person's own baseline stretch, and low mood fell with it.

```widget
{
  "type": "source",
  "id": "s21"
}
```

Seven patients. Four different conditions. No placebo, no blinding, and a within-person comparison against a baseline assessed after the fact, in conditions that swing on their own. It is a hypothesis-generating observation that nobody generated a hypothesis from: in the forty-two years since, no controlled pain trial of DSIP has been run.

## The rat says growth hormone and the woman says no

The rat result is genuinely elegant. Iyer, Marks, Kastin and McCann kept male rats awake for four hours on a slowly turning wheel. When they were taken off it, both slow-wave sleep and growth hormone in the blood shot up. Microinjecting a highly specific anti-DSIP antibody into the third ventricle blocked both rises. Ordinary rabbit serum did not.

```widget
{
  "type": "source",
  "id": "w_7lo702h8"
}
```

The human result is the opposite. Giusti's group in Genoa gave 25 µg/kg of DSIP into a vein over thirty minutes to eight healthy women. Baseline growth hormone: unchanged. Prolactin: unchanged. The daily rhythm of both: unchanged. The growth hormone response to an arginine challenge: unchanged. The authors pointed out that the dose they used was already known to alter the ECG — so it was reaching the subject, and it was doing nothing to growth hormone.

```widget
{
  "type": "source",
  "id": "w_zga2djoc"
}
```

Marketing copy that promises a growth hormone release is citing the rat and ignoring the woman.

Luteinising hormone runs the same course. DSIP triggered LH release in ovary-removed rats that had been primed with oestrogen and progesterone, did nothing in unprimed animals, and did nothing at all to pituitary tissue in a dish — meaning any effect is happening in the hypothalamus and depends on the hormonal background.

```widget
{
  "type": "source",
  "id": "w_lq5x8aor"
}
```

DSIP-like material has been found sitting in the same storage vesicles as LH-releasing hormone in the rat median eminence, which is suggestive. No endocrine effect of DSIP in a human being has ever been shown by anybody.

## The stress work is the most internally consistent animal data

Rats given DSIP into the belly at 40, 120, 360 and 1080 µg/kg before acute and repeated electric foot-shock showed liver malondialdehyde back to normal, liver cell protein production restored, and serum alanine aminotransferase back to normal. The dose curve was again a hump, not a slope: 120 µg/kg normalised fat oxidation damage in acute stress, while 40 µg/kg was the effective dose under chronic stress.

```widget
{
  "type": "source",
  "id": "w_cqubqjkn"
}
```

DSIP and its analogue DSIP-12 cut the frequency, severity and length of metaphit-triggered sound-induced seizures in rats, with the analogue beating the parent compound.

```widget
{
  "type": "source",
  "id": "w_1pggv0x0"
}
```

Schoenenberger's own characterisation work reported effects on the daily activity rhythm, on brain monoamine levels, on plasma proteins and on cortisol — a spread wide enough that he coined the phrase "programming functions" rather than claiming a mechanism.

Two caveats attach here. Most of this literature comes from Russian, Ukrainian and Serbian laboratories, much of it published in Russian, and very little has been repeated outside those groups. And an effect on rodent liver enzymes under electric shock is a long way from anything you can act on.

## Fifty years of looking and nobody has found the receptor

This is the strangest fact about DSIP and the one that should carry the most weight. For a peptide under continuous study since the 1970s, no gene, no precursor protein and no receptor has ever been isolated.

```widget
{
  "type": "source",
  "id": "w_l0pqsfj3"
}
```

What exists instead:

- **Binding sites, never a receptor.** Autoradiography in 1984 found tritium-labelled DSIP sticking to the bodies and branches of cultured rat brain-stem neurones, and unlabelled peptide pushed it off. That observation is forty-two years old and was never followed through into a cloned receptor.
- **The material shows up in the wrong places.** DSIP-like material concentrates in hypothalamic neurosecretory nuclei that have little to do with sleep. Kovalzon's reading is that the material being detected belongs to a different, related molecule nobody has identified — which would explain both the distribution and the erratic biology.
- **Artificial versions work better than the real one.** Kovalzon's group found that certain man-made DSIP analogues significantly promote slow-wave sleep in rabbits and rats, and that DSIP itself does not. A naturally occurring dermorphin ten-residue peptide sharing five of nine positions promotes slow-wave sleep, while its mirror-image form suppresses it.
- **An adrenaline hypothesis that failed its test.** Graf and Kastin's 1986 review proposed that DSIP works by changing adrenaline-type transmission. Direct testing found DSIP did nothing to noradrenaline release from rat brain nerve endings at concentrations from 10⁻⁸ to 10⁻⁵ M, while leu-enkephalin in the same preparation did.
- **An opioid interaction that passed.** The naloxone reversal replicated. It remains the only mechanical claim about DSIP with independent support.

```widget
{
  "type": "source",
  "id": "s53"
}
```

## It gets into the brain and then it is gone in four minutes

DSIP is one of the small set of peptides shown to cross from blood into brain by simple diffusion despite carrying a charge and liking water — a finding that made it a standard test compound in blood-brain barrier research. How much reaches dog spinal fluid tracks its blood concentration, its survival time in blood, and how fat-soluble it is.

```widget
{
  "type": "source",
  "id": "s7"
}
```

Then the clearance numbers undo the story. Kato and colleagues built an enzyme immunoassay and measured it directly after injection into a vein:

| Species | Half gone from blood in | Clearance rate |
|---|---|---|
| Dog (n=4, anaesthetised) | 4.0 ± 0.7 min | 30.7 ± 2.5 mL/kg/min |
| Monkey (n=1) | 2.9 min | — |
| Rat (n=3) | 2.0 ± 0.54 min | — |

```widget
{
  "type": "source",
  "id": "w_w4ku9pni"
}
```

Breakdown is why. Put DSIP in human or rat blood and what comes back has the fingerprint of free tryptophan — the front residue gets snipped off and the intact peptide stops existing. Phosphorylated and iodine-labelled versions break down more slowly and form complexes, which is the proposed reason they act more strongly and more consistently than the plain peptide.

```widget
{
  "type": "source",
  "id": "w_nxo79twi"
}
```

Now put that number next to the claim being made. A compound that is half gone from your blood in two to four minutes, injected before bed, is absent from your circulation for essentially the entire night it is supposed to be governing.

Two readings survive that, and only two.

Either the injection is a brief trigger that starts something slower downstream — and the one piece of evidence for that is Schneider-Helmert's observation that the improvement carried into a post-treatment placebo night.

Or the reported effects are not the compound.

Nobody has run the experiment that separates those two.

One more thing sits underneath it. The DSIP-like material your body carries in blood, urine and spinal fluid appears to be bound to a larger carrier protein and protected from being chewed up. Injected synthetic peptide is not bound to anything.

## What people taking it report, counted: 18 better, 10 worse, 5 nothing, of 35

Forty-five Reddit threads and comments about DSIP are catalogued as sources on this page, pulled on 29 June 2026. Ten of them are protocol questions, vendor posts and guides with no outcome in them. That leaves **35 posts where a named person says what they took and what happened.**

| What was reported | Posts | Share of the 35 |
|---|---|---|
| Sleep improved | 18 | 51% |
| Sleep got worse, or a new bad effect appeared | 10 | 29% |
| Nothing at all | 5 | 14% |
| Worked, then stopped working | 1 | 3% |
| Mixed — one sleep measure moved, the others did not | 1 | 3% |

Eighteen X posts and two Instagram reels are also catalogued and are deliberately **not** counted in that 35. They run overwhelmingly positive, and on those platforms a first-hand report and an advertisement are not reliably distinguishable.

This is a curated set, not a survey, and the direction of the curation is unknown. Read it only for the shape: **about half the people who bothered to write down what happened reported no benefit or an active harm.** That is not the distribution a working sleeping pill produces. It is the same split the controlled trials produced, reached by a completely different route.

### The 18 reports of improvement are vivid and specific

First night, tracked on a wearable:

```widget
{
  "type": "source",
  "id": "s43"
}
```

Deep and REM each up by about forty minutes, with the writer noting tolerance appearing after three or four days:

```widget
{
  "type": "source",
  "id": "s10"
}
```

The dream reports are their own category and they are consistent enough to be worth reading as a signal rather than as colour:

```widget
{
  "type": "source",
  "id": "s9"
}
```

```widget
{
  "type": "source",
  "id": "s63"
}
```

Long-run users. Two years on it, off a self-experimentation forum:

```widget
{
  "type": "source",
  "id": "s19"
}
```

Three weeks before anything changed, then months with no tolerance, at 300–500 mcg under the skin:

```widget
{
  "type": "source",
  "id": "s78"
}
```

Sleep going from three to five hours a night to seven to nine, after alcohol withdrawal wrecked it:

```widget
{
  "type": "source",
  "id": "s74"
}
```

```widget
{
  "type": "source",
  "id": "s58"
}
```

```widget
{
  "type": "source",
  "id": "s101"
}
```

```widget
{
  "type": "source",
  "id": "s75"
}
```

```widget
{
  "type": "source",
  "id": "s65"
}
```

```widget
{
  "type": "source",
  "id": "s98"
}
```

```widget
{
  "type": "source",
  "id": "s26"
}
```

```widget
{
  "type": "source",
  "id": "s27"
}
```

```widget
{
  "type": "source",
  "id": "s42"
}
```

```widget
{
  "type": "source",
  "id": "s62"
}
```

```widget
{
  "type": "source",
  "id": "s18"
}
```

```widget
{
  "type": "source",
  "id": "s81"
}
```

### The 5 reports of nothing happening are just as specific

Two full vials, dosed under a doctor's direction:

```widget
{
  "type": "source",
  "id": "s20"
}
```

```widget
{
  "type": "source",
  "id": "s41"
}
```

A full 5 mg vial, from a commenter under one of the enthusiastic posts above:

```widget
{
  "type": "source",
  "id": "s44"
}
```

Two months, in someone whose sleep was already good:

```widget
{
  "type": "source",
  "id": "s59"
}
```

125 mcg in the day and about 300 mcg before bed:

```widget
{
  "type": "source",
  "id": "s100"
}
```

### The 10 reports where it made sleep worse are the ones vendor pages never carry

Straightforward insomnia from a sleeping compound:

```widget
{
  "type": "source",
  "id": "s77"
}
```

```widget
{
  "type": "source",
  "id": "s93"
}
```

```widget
{
  "type": "source",
  "id": "s94"
}
```

```widget
{
  "type": "source",
  "id": "s95"
}
```

Four hours of sleep, from someone who ran it for sleep-maintenance insomnia:

```widget
{
  "type": "source",
  "id": "s73"
}
```

Deep sleep measured going the wrong way — 45 minutes a night down to 8 by day five:

```widget
{
  "type": "source",
  "id": "s76"
}
```

```widget
{
  "type": "source",
  "id": "s72"
}
```

```widget
{
  "type": "source",
  "id": "s64"
}
```

Worked for sleep and produced a hangover the next day:

```widget
{
  "type": "source",
  "id": "s66"
}
```

Longest uninterrupted sleep the tracker had ever recorded, followed by two hours of lying awake on subsequent nights:

```widget
{
  "type": "source",
  "id": "s57"
}
```

Sleep getting *worse* deserves more attention than it usually gets, because it is neither the shape of an inert compound nor the shape of a placebo. Two things in the published record line up with it directly.

Schneider-Helmert's 1981 study found a mild **waking-up** effect in the first hour after injection, before any sleep-promoting effect showed up. People are injecting fifteen to sixty minutes before bed, which puts the dose squarely inside that first hour.

And the dose curve reported throughout the animal literature is a hump. A dose past the peak can plausibly do the opposite of the dose at the peak. That curve has never been mapped in a human being, at any dose, by anyone.

### One report describes tolerance, and nothing in the literature addresses it

```widget
{
  "type": "source",
  "id": "s17"
}
```

No human study ran longer than seven nights in a row. Whether an effect survives weeks of nightly use has never been tested by anybody.

### One report is mixed, and it is the most precise in the set

Sleep length and deep sleep unchanged, but REM present every night where it had not been before:

```widget
{
  "type": "source",
  "id": "s96"
}
```

### Two threads independently reproduce the 1980s withdrawal finding

The most unexpected corroboration in the self-report record is not about sleep at all. People treating opiate withdrawal describe relief from DSIP under the skin and up the nose in terms close to Dick's Geneva series of 1983 — forty-two years later, with no sign of knowing that series exists.

```widget
{
  "type": "source",
  "id": "s97"
}
```

That does not make the withdrawal claim true. Uncontrolled reports of a self-limiting syndrome resolving are still uncontrolled reports. What it does mean is that the strongest signal in the published record and the strongest signal in the self-report record point at the same non-sleep use, which is worth more than another sleep testimonial.

### Why none of it settles the question

Sleep is the outcome most sensitive to what you expect, and self-report is the weakest instrument for measuring it. One detail from the controlled record cuts against dismissing the whole thing, though. In the Bes trial the objective polysomnography numbers improved while how the sleep *felt* did not. That is the reverse of a placebo signature — placebo moves the feeling first. The authors still judged the effect weak, partly attributable to drift in the placebo group, and advised against using it. That position remains more defensible than either the enthusiasts' or the debunkers'.

## Sleep does gate pain and repair, and that is not evidence about this compound

If you are here because pain is keeping you awake, or because being awake is making the pain worse, the link is real and it is well documented. It is also a completely different proposition from anything above, and keeping the two apart is the whole job of this section.

**Poor sleep predicts new and worsening pain more reliably than pain predicts poor sleep.** Population studies following people over time show sleep problems arriving before new pain and before flare-ups. Fine-grained work with objective measures on both sides finds the sleep-to-pain direction is the stronger one.

```widget
{
  "type": "source",
  "id": "w_47nktqzd"
}
```

**One night without sleep measurably lowers your pain threshold.** Acute sleep deprivation amplifies the pain response in primary somatosensory cortex, blunts it in the striatum and insula, and widens the range of temperatures a person calls painful. Outside the laboratory, ordinary night-to-night changes in one person's sleep quality predict next-day changes in their pain, in both directions.

```widget
{
  "type": "source",
  "id": "w_9shvk46m"
}
```

**Two nights of partial restriction is enough to change a pressure pain threshold at the trapezius.** Twenty-one healthy volunteers, paired crossover, sleep cut by half for two nights: pressure pain threshold at the trapezius fell, p = 0.017, and the pain-triggered EEG response got bigger.

```widget
{
  "type": "source",
  "id": "w_2zo637na"
}
```

**Broken sleep slows healing in animals.** Fragmenting sleep stretched the time to half-closure of a wound from 10.3 to 13.3 days in diabetic mice, with more TNF-α in the wound. Sleep-deprived rats healing burns grew fewer tissue-building cells and fewer new capillaries than controls.

```widget
{
  "type": "source",
  "id": "w_ikb821wn"
}
```

```widget
{
  "type": "source",
  "id": "w_7fiszq9g"
}
```

Now the line, drawn as sharply as it needs to be.

All of that is evidence that **sleep** matters to pain and to repair. None of it is evidence that **DSIP** improves sleep. The first proposition has population studies, controlled human experiments and animal tissue work behind it. The second has an inconsistent fifty-year record concentrated in one laboratory and a self-report split that is close to a coin flip.

Treating the strength of the first as if it transfers to the second is the exact move the marketing around this compound depends on. The evidence for one thing gets handed over while a different thing is sold. It is worth being able to see it happen, because it happens in one sentence and the sentence sounds reasonable.

## If the goal is sleep, here is what actually has the evidence

**Cognitive behavioural therapy for insomnia.** Twenty randomised controlled trials, 1,162 participants. Time to fall asleep improved by 19.0 minutes (95% CI 14.1–23.9). Time spent awake after falling asleep improved by 26.0 minutes (95% CI 15.5–36.5). Sleep efficiency improved by 9.9% (95% CI 8.1–11.7). The gains held at later follow-up and no harms were reported. It is first-line in the guidelines for a reason, and its two active ingredients — restricting time in bed, and using the bed only for sleep — need no prescription and cost nothing.

```widget
{
  "type": "source",
  "id": "w_363tewrt"
}
```

**Licensed sleeping pills, with their costs stated.** The largest network meta-analysis covers 170 trials and 47,950 participants. Benzodiazepines, doxylamine, eszopiclone, lemborexant, seltorexant, zolpidem and zopiclone all beat placebo for short-term treatment, with standardised effect sizes from 0.36 to 0.83. Eszopiclone and lemborexant came out with the best overall profiles. Zopiclone and zolpidem caused more people to quit over side effects than placebo did.

```widget
{
  "type": "source",
  "id": "w_ry66bqki"
}
```

**And the one most people have already tried, which does not work.** In that same analysis, melatonin, ramelteon and the unlicensed drugs showed no material benefit overall.

Set the comparison out plainly, because it is the comparison that matters. The best-evidenced sleep intervention rests on 1,162 randomly assigned people, with an effect that lasted and no harms recorded. The best-evidenced DSIP sleep trial rests on eight people per arm and concluded that short-term treatment was not likely to be of major benefit.

## Dosing, and the gap between the studies and what is sold

Every human trial used 25 nmol/kg into a vein. At a molecular weight of 849 that is 21.2 µg/kg — about 1.5 mg for a 70 kg adult. Schneider-Helmert's 1986 week-long study used 30 nmol/kg. Giusti's endocrine study used 25 µg/kg into a vein over thirty minutes.

The market dose is 100 to 300 mcg under the skin before bed.

That is five to fifteen times lower than the only dose ever given to a human being, by a route never tested in one. Both changes are undocumented. Against a compound whose dose curve is a hump rather than a slope, cutting the dose fifteen-fold is not the cautious choice. It is an untested choice, and it can land anywhere on that curve including flat zero.

Timing in the circulating protocols is 15 to 60 minutes before you intend to sleep. Worth knowing before you set that: Schneider-Helmert's 1981 study found the mild waking-up effect in the first hour after injection, with the sleep-promoting effect only turning up in the second.

```widget
{
  "type": "source",
  "id": "s3"
}
```

Under the skin and up the nose are the two routes in circulation. There is no comparative human data, and nothing has ever been published on how the body absorbs and clears the nasal form.

### Mixing a vial is arithmetic

DSIP ships as a dry powder in a sealed glass vial, usually 2 mg or 5 mg. You mix it with bacteriostatic water — sterile water with 0.9% benzyl alcohol in it, the preservative that makes it safe to put a needle into the same vial more than once. The measuring device is a U-100 insulin syringe: 100 marks per millilitre, so one mark is 0.01 mL.

Two lines produce every number you need:

- Concentration in mcg per mL = total mcg in the vial ÷ mL of water added.
- Mcg per mark = concentration ÷ 100.

Worked through: a 5 mg vial holds 5,000 mcg. Add 2.5 mL of bacteriostatic water. 5,000 ÷ 2.5 = 2,000 mcg/mL. 2,000 ÷ 100 = 20 mcg per mark. A 100 mcg dose is 100 ÷ 20 = 5 marks on the barrel.

| Vial | Bacteriostatic water | Concentration | Mcg per mark | Marks for 100 mcg | Marks for 200 mcg | Marks for 300 mcg |
|---|---|---|---|---|---|---|
| 2 mg (2,000 mcg) | 2.0 mL | 1,000 mcg/mL | 10 | 10 | 20 | 30 |
| 2 mg (2,000 mcg) | 1.0 mL | 2,000 mcg/mL | 20 | 5 | 10 | 15 |
| 5 mg (5,000 mcg) | 2.0 mL | 2,500 mcg/mL | 25 | 4 | 8 | 12 |
| 5 mg (5,000 mcg) | 2.5 mL | 2,000 mcg/mL | 20 | 5 | 10 | 15 |
| 5 mg (5,000 mcg) | 5.0 mL | 1,000 mcg/mL | 10 | 10 | 20 | 30 |
| 10 mg (10,000 mcg) | 5.0 mL | 2,000 mcg/mL | 20 | 5 | 10 | 15 |

Adding more water does not change how much peptide is in the vial. It changes only how many marks carry a given dose. Below about five marks, the error in reading a U-100 barrel starts to dominate your dose — which is the practical argument for more water, not less, at the 100 mcg tier.

Let the vial come to room temperature before you add water. Run the water down the inside wall instead of squirting it onto the powder. Swirl until it dissolves and never shake it: the shearing at the air-liquid surface unfolds peptides and makes them clump, and clumping is exactly the mechanism FDA named when it raised the question of whether the immune system would react to it.

### Storage has a hard clock

| State | Temperature | How long it is good for |
|---|---|---|
| Sealed dry vial | 2–8 °C, out of the light | To the manufacturer's date; −20 °C for long holding |
| Mixed with bacteriostatic water | 2–8 °C | About four weeks, set by the preservative |
| Mixed, left at room temperature | 20–25 °C | Hours to days; treat it as spoiled |
| Mixed, then frozen | −20 °C | Avoid. Freezing and thawing clumps peptides |

A 5 mg vial at 100 mcg a night is fifty doses, which is far more nights than the four-week window a mixed vial gives you. The arithmetic forces a choice: buy a smaller vial, take a bigger nightly dose, or throw most of what you paid for away.

### Timelines, and what would count as an answer

The circulating protocols run five nights on and two off, or three to five nights a week, for four to eight weeks. There is no evidence base under any of those schedules. No human study of DSIP ran longer than seven nights in a row, and none tested taking it on and off.

The trial that would settle it is easy to specify and has never been run: randomised, blinded, placebo-controlled, with overnight sleep recording, in long-term insomnia, DSIP under the skin at 100–300 mcg — the doses that are actually sold — with sleep efficiency and minutes of slow-wave sleep as the primary outcomes. Anything short of that leaves the position exactly where 1980 left it.

## Regulatory status: withdrawn by the nominator, not cleared by the agency

Emideltide, the international nonproprietary name for DSIP, appears on FDA's page *Certain Bulk Drug Substances for Use in Compounding That May Present Significant Safety Risks*, in the table headed **"Bulk drug substances nominated but withdrawn"**. It is one of seventeen entries there, alongside BPC-157, TB-500, KPV, Semax, Selank acetate, Thymosin alpha-1, Epitalon, MOTS-C, Melanotan II, CJC-1295, AOD-9604 and GHK-Cu.

FDA's stated reason, word for word: compounded drugs containing emideltide "may pose risk for immunogenicity for certain routes of administration and may have complexities with regard to peptide-related impurities and API characterization. FDA has not identified safety-related information regarding emideltide for the proposed route... Therefore, the agency lacks sufficient information to know whether the drug would cause harm if administered to humans."

```widget
{
  "type": "source",
  "id": "w_ww3yt0x9"
}
```

What that status means, precisely:

- It is **not an approval** and it is **not a ban**. It is the record of a request. Somebody asked FDA to allow emideltide as a bulk substance for pharmacy compounding; FDA put it in category 2 — substances that may present significant safety risks; the person who asked then withdrew the request. FDA's own words on the page are that these substances were "previously in category 2 of the interim policies" and "were withdrawn by the nominators."
- The practical consequence is that emideltide is **not on the 503A or 503B bulks lists**. A compounding pharmacy cannot lawfully compound it as a bulk drug substance. What is offered for sale is research-use-only chemical, not medicine, and it comes with no assurance of identity, purity or sterility.
- FDA's specific worries are, in order: clumping and whether the immune system would react to it by certain routes, peptide-related impurities, characterisation of the active ingredient, and — the operative one — an absence of safety information for the route being proposed.
- No marketing authorisation for DSIP exists in any country, and none has ever been applied for.

```widget
{
  "type": "source",
  "id": "s56"
}
```

A 2026 review of therapeutic peptides in orthopaedics lists DSIP among the recovery-oriented compounds and states the position for the whole class in one line: the preclinical work looks good, and there are no clinical trials.

```widget
{
  "type": "source",
  "id": "w_d2edzzyj"
}
```

## Where that leaves the compound

A confirmed nine-residue sequence.

Half gone from the blood in two to four minutes.

No gene, no precursor, no receptor, after fifty years of people looking for all three.

A sleep record whose positive findings are concentrated in the laboratory that discovered it, and whose independent replications are null.

A withdrawal literature covering several hundred patients with no control group in any of it, in a syndrome that ends on its own.

One seven-patient pain pilot, never followed up in forty-two years.

A growth hormone claim that holds in rats and fails in the only eight humans it was ever tested in.

Zero registered trials, ever.

Thirty-five first-hand reports splitting eighteen good, ten bad, five nothing.

And a regulatory file recording a withdrawn request and an agency saying it does not have enough information to know whether the substance would hurt you.

The peptide is named for the one effect its evidence supports least.

The sibling objects for this page, each one inspectable on its own terms:

![[bpc-157]]

![[kpv]]

![[ghk-cu]]

![[thymosin-alpha-1]]

![[ara-290]]

## Facts

```json
{
  "converted_from": "markdown",
  "original_updated": "2026-08-04T20:47:25.414Z",
  "register": "essay",
  "category": null
}
```

## Sources

1. [Evidence for a role of delta sleep-inducing peptide in slow-wave sleep and sleep-related growth hormone release in the rat](https://www.pnas.org/doi/10.1073/pnas.85.10.3653) — “These increases were blocked by microinjection into the third cerebral ventricle of highly specific antiserum to DSIP.” (sha256 cb91d8a26956d8cd)
2. [Effects of delta sleep-inducing peptide on sleep of chronic insomniac patients. A double-blind study](https://pubmed.ncbi.nlm.nih.gov/1299794/) — “The results for objective sleep quality indicated higher sleep efficiency and shorter sleep latency with DSIP as compared to placebo.” (sha256 1cfeb166d62ee50b)
3. [The influence of synthetic DSIP on disturbed human sleep](https://pubmed.ncbi.nlm.nih.gov/7028502/) — “longer sleep duration and a higher quality of sleep with fewer interruptions; slightly more REM-sleep, but no day-time sedation” (sha256 f31b288513cb6178)
4. [Delta sleep-inducing peptide](https://journals.lww.com/ejanaesthesiology/fulltext/2001/07000/delta_sleep_inducing_peptide.1.aspx) — “DSIP promotes sleep and this has been demonstrated in rabbits, mice, rats, cats and human beings” (sha256 6f9c2246127cd7fc)
5. [DSIP Peptide user discussion](https://www.instagram.com/reel/DURfvtYj6Qz/) — “my deep sleep is soooo high. It doesn't make you tired or ...” (sha256 35d9e74463791d90)
6. [Delta sleep-inducing peptide (DSIP): a still unresolved riddle](https://pubmed.ncbi.nlm.nih.gov/16539679/) — “Delta sleep-inducing peptide (DSIP) was isolated from rabbit cerebral venous blood by Schoenenberger-Monnier group from Basel in 1977 and initially regarded as a candidate sleep-promoting factor.” (sha256 d3b58c2efd069c2b)
7. [Pichia pastoris secreted peptides crossing the blood-brain barrier](https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2024.1439536/full) — “Delta sleep-inducing peptide (DSIP) is composed of 9 amino acids and has been implicated in the regulation of sleep, modulation of stress (Morgan, 2023), and exhibits a wide range of physiological and pharmacological effects.” (sha256 ec113dc0c7300799)
8. [Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke](https://pubmed.ncbi.nlm.nih.gov/34500605/) — “Intranasal administration of DSIP in the course of 8 days leads to accelerated recovery of motor functions.” (sha256 64d55160554067cd)
9. [DSIP Review: The Sleep Peptide That Gave Me Inception Level Lucid Dreams](https://www.reddit.com/r/USPeptides/comments/1pcdd5q/dsip_review_the_sleep_peptide_that_gave_me/) — “it’s like Inception in a bottle. You have dreams that are three layers deep lol. They’re the most vivid dreams possible.” (sha256 7541398128f0b931)
10. [DSIP GREATLY Improved Sleep (DEEP and REM)!!](https://www.reddit.com/r/Biohackers/comments/1qab419/dsip_greatly_improved_sleep_deep_and_rem/) — “I tried Delta Sleep-Inducing Peptide (DSIP) last night and it improved by Deep and REM sleep by about 40mins each!!” (sha256 ec04843d55c663ed)
11. [DSIP Peptide: Revolutionizing Sleep, Stress, and Pain Management](https://www.youtube.com/watch?v=grwWLZedRQQ) — “Discover the groundbreaking potential of Delta Sleep Inducing Peptide (DSIP) in enhancing sleep quality, reducing stress, managing pain, and supporting recovery.” (sha256 68431f193018de62)
12. [DSIP (Delta Sleep-Inducing Peptide) | Full Rundown [2026]](https://www.innerbody.com/dsip-delta-sleep-inducing-peptide) — “A large share of DSIP studies on sleep health have been animal studies, but a few human trials took place in the 1980s.” (sha256 59335e5b486c940b)
13. [Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke](https://pmc.ncbi.nlm.nih.gov/articles/PMC8434407/) — “Intranasal administration of DSIP in the course of 8 days leads to accelerated recovery of motor functions.” (sha256 64d55160554067cd)
14. [How does the Peptide DSIP Work?](https://www.youtube.com/watch?v=dz6vYHXE3Yc) — “DSIP is a neuropeptide studied for its potential involvement in sleep regulation, stress responses, and neuroendocrine signaling. Although its exact mechanism of action remains unclear, research suggests it may influence multiple brain pathways related to rest and recovery.” (sha256 c8d7c8cac26aaa70)
15. [DSIP is Wild](https://www.reddit.com/r/Biohackers/comments/1stygfi/dsip_is_wild/) — “Anyone try high dose DSIP ? 1.5+ mg ( Delta-Sleep-Inducing Peptide )” (sha256 bb48d24845f8db5c)
16. [DSIP (Emideltide) FDA Update: Sleep Peptide Moves Forward](https://newtropin.com/blog/dsip-emideltide-fda-update) — “The FDA’s updated 503A document, published April 15, 2026, removes Emideltide/DSIP (both Emideltide acetate and Emideltide free base) from Category 2 and schedules the peptide for PCAC review on July 24, 2026.” (sha256 25b050f179f9fd61)
17. [any personal experience with DSIP (Delta Sleep-Inducing ...](https://www.reddit.com/r/Biohackers/comments/1afsuih/any_personal_experience_with_dsip_delta/) — “Happy to - soooo, unfortunately, dsip lost its effect (I took it for about 3 months and the last month it wasn't working). Tried from two different sources and still nada.” (sha256 760e03640320d806)
18. [DSIP Review: The Sleep Peptide That Gave Me Inception ...](https://www.reddit.com/r/LucidDreaming/comments/1tkp3dv/dsip_review_the_sleep_peptide_that_gave_me/) — “If I had to describe my experience so far in one sentence, it’s this: it’s like Inception in a bottle. You have dreams that are three layers deep lol. They’re the most vivid dreams possible. I’ve had a couple lucid dreams, and when you wake up, you’re like, holy shit… was that real or was that a dream? I cannot express enough how crazy my dreams have been. I’ve definitely noticed I feel a lot more well-rested when I wake up.” (sha256 055c664ed336c6fc)
19. [Sleep Quality DSIP - Self-Experimentation - Age Reversal Forum](https://forum.age-reversal.net/t/y4yz380/sleep-quality-dsip) — “For the past couple years I have been using a peptide called deep-sleep-inducing-peptide (DSIP). Its a sub-q injection, and for me it has been remarkably effective. Since using DSIP, I sleep through the night, only waking briefly for bathroom breaks before quickly falling back asleep. I've also noticed I'm dreaming nightly. ... If you're experiencing similar sleep disruptions, you might consider DSIP as a potential solution. It's been a game-changer for my sleep quality” (sha256 7fc0a1a07692600a)
20. [r/Peptides - DSIP is disappointing](https://www.reddit.com/r/Peptides/comments/1tfq46s/dsip_is_disappointing/) — “I was disappointed that DSIP had no effect for me. I tried it two times for the full vial with dosing under the direction of a licensed medical ...” (sha256 c9c3152d496d058b)
21. [Therapeutic effects of delta-sleep-inducing peptide (DSIP) in patients with chronic, pronounced pain episodes.](https://pubmed.ncbi.nlm.nih.gov/6548970/) — “DSIP lowered significantly the pain levels of 6 out of 7 patients after intravenous administration on 5 consecutive days followed by 5 injections every 48-72 h.” (sha256 90e752e0a20d74c8)
22. [Effects of delta-sleep-inducing peptide on 24-hour sleep-wake behaviour in severe chronic insomnia](https://pubmed.ncbi.nlm.nih.gov/3622582/) — “The treatment substantially improved night sleep with the first and additionally with repeated doses. Alertness and performance at daytime increased significantly.” (sha256 990504827e252825)
23. [DSIP Peptide: Research, Benefits, Dosage & Sleep Studies](https://drlewis.com/dsip-delta-sleep-inducing-peptide/) — “DSIP ( Delta Sleep-Inducing Peptide ) is a neuropeptide studied for sleep, stress, and brain health.” (sha256 f3c0676385378155)
24. [DSIP Peptide: Benefits, Dosage & 2026 Legal Status](https://riteaid.com/peptides/dsip) — “DSIP — Delta Sleep-Inducing Peptide — is a naturally occurring neuropeptide studied for its role in sleep regulation and stress resilience.” (sha256 98b6dfa93a28c095)
25. [Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke](https://www.mdpi.com/1420-3049/26/17/5173) — “Intranasal administration of DSIP in the course of 8 days leads to accelerated recovery of motor functions.” (sha256 64d55160554067cd)
26. [Dsip basically fixed my sleep apnea for a month](https://www.reddit.com/r/sleephackers/comments/1px0arq/dsip_basically_fixed_my_sleep_apnea_for_a_month/) — “i used a peptide called "dsip" for two days and the rate of me stopping breathing during the night went way down for a solid month as a repercussion.” (sha256 9a5708d505e883ce)
27. [Jumped from 300 mcg to 400 mcg DSIP last night... wow.](https://www.reddit.com/r/sleep/comments/1sxdxl9/jumped_from_300_mcg_to_400_mcg_dsip_last_night/) — “Huge improvement in sleep quality... Much higher quality and deeper sleep and I woke up actually feeling rested” (sha256 9f51fef6446bf45a)
28. [Delta-sleep-inducing peptide](https://en.wikipedia.org/wiki/Delta-sleep-inducing_peptide) — “Delta-sleep-inducing peptide (DSIP) is a neuropeptide that when infused into the mesodiencephalic ventricle of recipient rabbits induces spindle and delta EEG activity and reduced motor activities.” (sha256 e3e33b2000e6b904)
29. [DSIP PEPTIDE: Benefits, Dosage, Side Effects & Clinical Data](https://exploring-peptides.com/article/dsip-peptide-benefits-dosage-side-effects-clinical-data/) — “This article provides a comprehensive review of DSIP’s biological mechanisms, potential benefits, dosage considerations, comparative efficacy, and current research data.” (sha256 e108eec5af74df68)
30. [DSIP Peptide for Detox](https://www.phoenixrisingrecovery.com/rehab-blog/dsip-peptide/) — “DSIP, short for Delta Sleep-Inducing Peptide, is a naturally occurring peptide that was first identified in the 1970s.” (sha256 4c9c2451fa323310)
31. [DSIP for Deep Sleep: Benefits, Dosage & Safety](https://rwacenter.com/blog/dsip-the-natural-sleep-architect-for-restorative-rest-and-recovery/) — “DSIP (Delta Sleep-Inducing Peptide) is a nine-amino-acid neuropeptide first isolated in the 1970s from the brain tissue of rabbits exhibiting deep delta wave sleep.” (sha256 b69b3fbd91dbbfb0)
32. [DSIP Research Review Canada](https://luxaralabs.com/dsip-research-review-canada/) — “Delta Sleep-Inducing Peptide, commonly abbreviated as DSIP, is a naturally described nonapeptide studied in relation to sleep architecture, delta-wave EEG activity, neuroendocrine signaling, stress-response biology, circadian coordination, and peptide-mediated neuromodulation.” (sha256 51c3b018a2017a5e)
33. [105 - Delta Sleep Inducing Peptides –The Matt Walker Podcast](https://podcasts.apple.com/ky/podcast/105-delta-sleep-inducing-peptides/id1578319619?i=1000722424020) — “In this episode, Matt delves into the curious and cautionary tale of Delta Sleep-Inducing Peptide (DSIP), once hailed as a potential miracle cure for insomnia.” (sha256 b3428dfa16e5c19e)
34. [Peptide Regimens for Sleep Optimization and Hormonal Balance](https://www.mdiha.com/blog/peptide-regimens-for-sleep-optimization-and-hormonal-balance) — “Delta‑Sleep‑Inducing Peptide ( DSIP ) is the primary peptide that induces sleep by directly deepening delta‑wave activity” (sha256 876091b2a007bf89)
35. [Best Peptides for Sleep: What to Know Before You Try Them](https://www.kentonbruicemd.com/blog/best-peptides-for-sleep-what-to-know-before-you-try-them) — “Human studies have confirmed that DSIP can reduce sleep onset latency, increase total sleep time, and improve the proportion of time spent in deep, restorative slow-wave sleep” (sha256 d0a2486e6033dda3)
36. [DSIP (Delta Sleep Inducing Peptide)](https://healingmaps.com/dsip-delta-sleep-inducing-peptide-emideltide-explained/) — “Regulatory Update (April 2026): DSIP (also referred to as Emideltide) is one of seven peptides scheduled for FDA Pharmacy Compounding Advisory Committee review on July 24, 2026.” (sha256 c3206ac7954cf07d)
37. [DSIP: The Sleep Peptide That Changes How Canadians Sleep](https://www.redfoxpeptides.is/dsip-peptide-your-secret-weapon-against-sleepless-nights-canada/) — “DSIP ( Delta Sleep-Inducing Peptide ) is a naturally occurring nonapeptide first isolated in 1977 that helps regulate deep, restorative sleep without the sedative hangover of traditional sleep medications.” (sha256 37557c4d4a5950bc)
38. [X post by @AntiDoc on DSIP sleep benefits](https://x.com/AntiDoc/status/1904576757568545067) — “More/better sleep means more/dramatically better gains. That’s why DSIP is quickly becoming one of my favorite peptides. Ridiculous sleep every night. Ridiculous energy every morning.” (sha256 5538e5ea2498cc54)
39. [X post by @zapmethod on DSIP experience](https://x.com/zapmethod/status/2033990620008628244) — “HOW I WENT FROM RUSSIAN SLEEP EXPERIMENT TO SLEEP LIKE ROCK: ... 100mcg subq before bed ... wake up 9 hours later ... wtf actually dreamed. vivid as hell not groggy. actually refreshed” (sha256 5fad733a81991100)
40. [Instagram reel on DSIP](https://www.instagram.com/reel/DR0k-o6ge8D/) — “DSIP, short for Delta Sleep Inducing Peptide, is a naturally occurring peptide that has been studied for its potential role in supporting healthy sleep ... promotes deeper sleep cycles — including REM and slow-wave sleep.” (sha256 1922f6d9ef7c383a)
41. [DSIP peptide guide](https://www.reddit.com/r/NTNPerformance/comments/1t81ivi/dsip_peptide_guide/) — “I was disappointed that DSIP had no effect for me. I tried it two times for the full vial with dosing under the direction of a licensed medical professional, and nothing. I don’t know why.” (sha256 699ca024d81d3ced)
42. [DSIP peptide guide](https://www.reddit.com/r/NTNPerformance/comments/1t81ivi/dsip_peptide_guide/) — “I slept so hard last night! I'm still tired today, but much more manageable than it usually is. I will cycle 3x a week for 2 weeks to start.” (sha256 80988b6bc6518caf)
43. [Results of FIRST night of using DSIP for sleep. INCREDIBLE!](https://www.reddit.com/r/Biohackers/comments/1ly6cq0/results_of_first_night_of_using_dsip_for_sleep/) — “I got more restoritive deep sleep in one night than I have in the past 3 days!! My brain feels so just relieved waking up this morning.” (sha256 6c7a1580c2b18989)
44. [Results of FIRST night of using DSIP for sleep. INCREDIBLE!](https://www.reddit.com/r/Biohackers/comments/1ly6cq0/results_of_first_night_of_using_dsip_for_sleep/) — “I went through a 5mg vial with no discernable benefits. It's great op is getting such excellent results. Just shows we're all different.” (sha256 f695413a3cb83665)
45. [X post by @anamarz_amz](https://x.com/anamarz_amz/status/2068064147854516477) — “Ever tried DSIP for sleep? I swear in 10 years of insomnia every night at 2-3 am, this is the only thing that keeps me asleep, brings down my sympathetic tone and other effects. While I can still function through the day.” (sha256 bee93548ae388c84)
46. [DSIP-Like KND Peptide Reduces Brain Infarction in C57Bl ...](https://pubmed.ncbi.nlm.nih.gov/33918965/) — “DSIP-Like KND Peptide Reduces Brain Infarction . When Administered during Reperfusion Biomedicines. Delta-Sleep-Inducing Peptide (DSIP);” (sha256 566b1d66d0bde133)
47. [Delta Sleep Inducing Peptide A comprehensive guide by a ...](https://www.youtube.com/watch?v=zG5GKyt0t2U) — “This little-known peptide could be the key to your best night's sleep ever. Learn about the fascinating science behind delta sleep inducing peptide, or DSIP, and how it may unlock deep, restorative slumber.” (sha256 5f8960575caac204)
48. [DSIP : Delta Sleep-Inducing Peptide](https://www.reddit.com/r/PeptideDiscussion/comments/1gu3fnq/dsip_delta_sleepinducing_peptide/) — “DSIP : Delta Sleep-Inducing Peptide . I'm grasping at straws y'all!! I'm not as bad as some but it's been two days since I have actually gotten ...” (sha256 a21d076bea953067)
49. [Doctor offering DSIP (Delta-sleep-inducing peptide), worth ...](https://www.reddit.com/r/PeptideForum/comments/1k74b9j/doctor_offering_dsip_deltasleepinducing_peptide/) — “Doctor offering DSIP ( Delta-sleep-inducing peptide ), worth buying? I have problems with sleep, I take halcion (a benzodiazepine that I wouls ...” (sha256 50444afdca5099ae)
50. [DSIP UK: Complete Research Guide (2026)](https://peptideslabuk.com/dsip-uk-complete-research-guide-2026/) — “Delta Sleep-Inducing Peptide (DSIP) is a naturally occurring nonapeptide that has been extensively studied for its effects on sleep ...” (sha256 6bd892564514c048)
51. [Pichia pastoris secreted peptides crossing the blood-brain barrier and DSIP fusion peptide efficacy in PCPA-induced insomnia mouse models](https://pubmed.ncbi.nlm.nih.gov/39444618/) — “Background: Pichia pastoris-secreted delta sleep inducing peptide and crossing the blood-brain barrier peptides ( DSIP -CBBBP) fusion peptides holds significant promise for its potential sleep-enhancing and neurotransmitter balancing effects.” (sha256 1bd112237dd7c74f)
52. [DSIP peptide isn't “just a sleep aid”](https://www.reddit.com/r/BioHackingGuide/comments/1qv30y1/dsip_peptide_isnt_just_a_sleep_aid/) — “The main idea is that when DSIP is doing what it's supposed to do, your body shifts more into parasympathetic mode, basically more “rest and ...” (sha256 ed17a30275546304)
53. [Delta-sleep-inducing peptide (DSIP): an update](https://pubmed.ncbi.nlm.nih.gov/3550726/) — “The isolation and characterization of delta-sleep-inducing peptide (DSIP) achieved from 1963 to 1977 were reviewed in 1984. The first reports describing sleep as well as extra-sleep effects of DSIP also were included in that work. Only two years later, much additional literature concerning DSIP has accumulated.” (sha256 7ffc7c5810dfda7d)
54. [A clinical trial with DSIP](https://pubmed.ncbi.nlm.nih.gov/6391926/) — “In an open study 7 patients with severe insomnia were treated by a series of 10 injections with the delta-sleep-inducing peptide (DSIP). In all but 1 case sleep was normalized for follow-up periods of 3-7 months. The mood and performance during the daytime improved as well.” (sha256 7a0fc2077271e9a8)
55. [Understanding Delta Sleep-Inducing Peptide and Sleep Regulation](https://www.empowersleep.com/articles/delta-sleep-inducing-peptide) — “Larger, well-designed clinical trials are needed to clarify whether DSIP has a meaningful role in the management of sleep disorders or other health conditions.” (sha256 d7c540a9d696257c)
56. [FDA Announces Change in Status of 12 Peptides](https://ssrpinstitute.org/news/fda-announces-change-in-status-of-12-peptides/) — “the FDA reported today that it will imminently remove the following bulk drug substances from category 2: BPC-157, LL-37, DiHexa, DSIP, Epitalon, *GHK-Cu (injectable only), KPV, PEG-MGF, Melanotan II, MOTs-C, Semax, and TB-500.” (sha256 968ad8b556766dbb)
57. [Delta Sleep Inducing Peptide (DSIP) for treating central sleep apnea?](https://www.reddit.com/r/Nootropics/comments/47jdzp/delta_sleep_inducing_peptide_dsip_for_treating/) — “My sleep tracker showed the longest chunks of uninterrupted sleep it's ever shown and I never woke up during the night. Unfortunately, it brought along a friend, insomnia. I usually fall asleep quickly, but after dosing DSIP it took me well over two hours despite being exhausted.” (sha256 fb82aa04f3d5044b)
58. [Has anyone tried DSIP(Delta Sleep-Inducing Peptide)?](https://www.reddit.com/r/insomnia/comments/1gu3ele/has_anyone_tried_dsipdelta_sleepinducing_peptide/) — “Took a few days for it to really show its effects on me but I get sleepy with in 15-20 mins of taking my dose and I get the best sleep. If I do wake up I go right back to sleep and I have never felt more rested in the morning.” (sha256 93cb554b8d9b605b)
59. [DSIP (delta sleep inducing peptide)](https://www.reddit.com/r/Biohackers/comments/18u5ocg/dsip_delta_sleep_inducing_peptide/) — “I used it for 2 months. I didn't notice much. My results may not reflect those seeking this peptide out as my sleep was already dialed in.” (sha256 0f01942ee1325398)
60. [X post by @whey777](https://x.com/whey777/status/2069942524815319485) — “Lastly, when cycling off of GH secretagogues, I decided to try DSIP (delta sleep inducing peptide). Tons of mixed reviews on this one. Personally, it helped me fall and stay asleep, and I did get better deep sleep. But it also made me sleep a bit longer.” (sha256 3b407b9072a98a89)
61. [X post by @troywhiteyyc](https://x.com/troywhiteyyc/status/2068891740736503946) — “I started testing out DSIP for sleep management. First night 1mg- no real major difference - 4 hours Second night 1mg - same amount of sleep Third night 1.5mg - 9 hours No idea if the 9 hours was because of higher dose of DSIP, or that I was just exhausted enough from the prior few nights!” (sha256 dc0e729a09984dc8)
62. [DSIP Recovery and Dreams](https://www.reddit.com/r/USPeptides/comments/1rakdga/dsip_recovery_and_dreams/) — “Very recently started DSIP for recovery and it does just that! I don’t feel so sore the next day and get quality sleep-also crazy off the wall dreams.” (sha256 f6a28243d3be313f)
63. [DSIP Recovery and Dreams](https://www.reddit.com/r/USPeptides/comments/1rakdga/dsip_recovery_and_dreams/) — “I just tried it, I dreamt I was selling Holstein cows to a family in Iraq - over the phone. Had another dream I was stealing pink towels from a hotel in China town while my kids ate dumplings on the elevator. I woke up several times, (not new for me) but went back to deep sleep” (sha256 47e93102c7a6ab0d)
64. [Peptide tier list for sleep. Ranked by sleep relevance, recovery support, and overall sleep quality](https://www.reddit.com/r/NTNPerformance/comments/1tnualo/peptide_tier_list_for_sleep_ranked_by_sleep/) — “Svddendemon: Have you taken it? I took a whole bottle and every night I did I got horrible sleep and woke up multiple times through the night.” (sha256 8c2d1363ac296588)
65. [Peptide tier list for sleep. Ranked by sleep relevance, recovery support, and overall sleep quality](https://www.reddit.com/r/NTNPerformance/comments/1tnualo/peptide_tier_list_for_sleep_ranked_by_sleep/) — “Taydontplay4: Love DSIP, but I did not initially. I stayed consistent with it and am on my 3rd vial and the magic is happening. It’s almost like my body had an adaptation period to it.” (sha256 d7de2b4005735da7)
66. [Peptide tier list for sleep. Ranked by sleep relevance, recovery support, and overall sleep quality](https://www.reddit.com/r/NTNPerformance/comments/1tnualo/peptide_tier_list_for_sleep_ranked_by_sleep/) — “Emmasmom5: DSIP worked but made me feel hung over the next day” (sha256 648925b16469526a)
67. [DSIP is a peptide to help deep sleep](https://www.facebook.com/groups/252962560254589/posts/1179093274308175/) — “DSIP is a peptide to help deep sleep. I'm only on my second day of use but my deep sleep has doubled and happens more often in the night.” (sha256 d365ddc937f11ad4)
68. [X post by @Lions_1776 on DSIP sleep duration](https://x.com/Lions_1776/status/2068064147854516477) — “Have you tried DSIP, Ed? I’m a light sleeper but when using DSIP, I can sleep as long as I like. It’s a nice compound.” (sha256 18f4c1bcd873787f)
69. [X post by @FattyNoNatty on DSIP experience](https://x.com/FattyNoNatty/status/2067706289006985373) — “You know, I've heard that- I tried DSIP, and I did notice a difference.. but when you just start getting good sleep it doesn't make sense to just keep adding stuff.” (sha256 a58b4f8224b5b351)
70. [Had anyone tried DSIP peptide to reset their circadian rhythm?](https://www.reddit.com/r/DSPD/comments/pnpial/had_anyone_tried_dsip_peptide_to_reset_their/) — “My sleep cycle is roughly 5am-1pm. I can happily fall asleep later than 5am and wake at 3pm, but this is the best I’ve been able to manage so far.” (sha256 82fde7d46411e88c)
71. [X post on DSIP fixing sleep schedule](https://x.com/Chrissssjohnson/status/2008202115186147361) — “My sleep schedule has been cooked since I came home from Iraq war 14 years ago 

14 years of needing sleeping pills to go to sleep

Now, I get sleepy naturally around 9/10 and wake up well rested around 5-6

Circadian rhythm fixed” (sha256 1883dcfe0bd14b22)
72. [Dsip experience](https://www.reddit.com/r/Biohackers/comments/1shazrp/dsip_experience/) — “I tried dsip for the first time last night. I went to bed at midnight but woke up at 5 a.m., so much earlier than expected, and my sleep quality felt worse. Is that normal?” (sha256 b2b9e976604a79c8)
73. [Peptides for Sleep (Sleep Maintenance Insomnia)](https://www.reddit.com/r/Biohackers/comments/1tca76g/peptides_for_sleep_sleep_maintenance_insomnia/) — “I’ve tried DSIP and it was horrible for me - I slept probably 4 hours. Only benefit was I wasn’t tired the following day.” (sha256 72ce751bb8fea03e)
74. [I wish I'd discovered DSIP for sleep earlier](https://www.reddit.com/r/BodyHackGuide/comments/1uhio7j/i_wish_id_discovered_dsip_for_sleep_earlier/) — “I've been struggling to get anything more than 3-5 hours of sleep for the half year due to Post Alcohol Withdrawal Syndrome, but I recently added DSIP into my recovery stack and I feel that my sleep has been even better than it was before I ever drank. I'm getting anywhere from 7-9 hours of sleep per night since getting DSIP - but even better is the return of my dreams. They're vivid and memorable now” (sha256 ad0f5d2014ceeca3)
75. [DSIP 💤 (Delta Sleep-Inducing Peptide) Better Deep Sleep | Cortisol Balance | CNS Recovery](https://www.reddit.com/r/USPeptides/comments/1p1fbgq/dsip_delta_sleepinducing_peptide_better_deep/) — “It’s quieter. More structural. Almost invisible until you notice you’re not waking up three times a night anymore. ... Week 2–3: Sleep gets deeper. Dreams get a little heavier. You wake up clearer — not energized, just not foggy.” (sha256 f3b3ff158bd75960)
76. [Im trying DSIP for the first time tonight, does anyone have any experience? (From my DR)](https://www.reddit.com/r/Biohackers/comments/1bqdrof/im_trying_dsip_for_the_first_time_tonight_does/) — “I’ve been taking DSIP for about five days now, and I think it’s actually making my deep sleep worse. At first, I was getting around 45 minutes of deep sleep each night and was hoping to improve that. But by the fifth day, I only got 8 minutes.” (sha256 9766305b146e0392)
77. [What Was Your Experience With DSIPS?](https://www.reddit.com/r/Peptidesource/comments/1ps5lgw/what_was_your_experience_with_dsips/) — “DSiP literally gave me insomnia the two nights I used it.” (sha256 ffe7e43e57085942)
78. [DSIP works, but requires patience](https://www.reddit.com/r/BodyHackGuide/comments/1tylecq/dsip_works_but_requires_patience/) — “DSIP completely transformed my sleep but not in the way I expected (stick with it) ... When I first started, I actually had a harder time falling asleep. ... around the three-week mark something shifted. My entire sleep architecture just changed. I started hitting what feels like genuinely deep, restorative sleep ... Now I'm a few months in and I haven't noticed any tolerance buildup ... Dose: 300-500mcg SubQ nightly” (sha256 2b911604916f156b)
79. [Peptide #26: DSIP](https://x.com/GiffenHealth/status/2068891740736503946) — “Peptide #26: DSIP Deep sleep inducer. The one that actually gives you restorative rest without grogginess. Underrated king for anyone whose recovery sucks.” (sha256 ac9d90e1e2e3b7b0)
80. [DSIP Spotlight](https://x.com/TalkingCry97534/status/2071051909964685532) — “DSIP Spotlight: The Delta Sleep-Inducing Peptide. Achieve deeper REM cycles and superior recovery with enhanced sleep architecture.” (sha256 0ff5030cec361b7e)
81. [DSIP + Selank: How I Leveled Up My Sleep](https://www.reddit.com/r/BodyOptimization/comments/1p5mc7j/dsip_selank_how_i_leveled_up_my_sleep/) — “When I paired the two together, I fell asleep faster because my mind was calmer, my sleep felt heavier and more restorative, I woke up fewer times, and I woke up feeling fresh instead of groggy. My heart rate was smoother throughout the night, deep sleep scores increased consistently, I recovered better from training, and I felt more mentally stable during the day.” (sha256 0bc4d17ed5dc4dc1)
82. [DSIP + Selank: How I Leveled Up My Sleep](https://www.reddit.com/r/BodyOptimization/comments/1p5mc7j/dsip_selank_how_i_leveled_up_my_sleep/) — “200mcg of DSIP and 500mcg Selank about an hour or an hour and a half so before bed” (sha256 c92b982b306ea536)
83. [Spotlight: DSIP is not just a sleep peptide. The HPA axis story is the bigger story.](https://www.reddit.com/r/Biohack_Blueprint/comments/1ufcu8a/spotlight_dsip_is_not_just_a_sleep_peptide_the/) — “Typical protocols use 100 to 200 mcg per night, taken 30 to 60 minutes before bed. Most people see effects within 1 to 2 weeks. Full HPA recalibration takes 4 to 8 weeks of consistent use.” (sha256 a94e51903a384f58)
84. [Delta Sleep Inducing Peptides - The Matt Walker Podcast](https://x.com/sleepdiplomat/status/1957519423457358246) — “In this episode, Matt delves into the curious and cautionary tale of Delta Sleep-Inducing Peptide (DSIP), once hailed as a potential miracle...” (sha256 81560ac3ad907267)
85. [https://x.com/TKubowitz9tdk/status/2071444996562227309](https://x.com/TKubowitz9tdk/status/2071444996562227309) — “The peptide DSIP may help those already in trouble. Also helps with alcohol, benzodiazepines, opiates and kratom.” (sha256 afaec0e53f66de52)
86. [A Complete Guide for DSIP](https://www.reddit.com/r/Ameano_Peptides/comments/1ocobsd/a_complete_guide_for_dsip/) — “DSIP ( Delta Sleep-Inducing Peptide ) is a naturally-occurring nonapeptide found in the brain and other tissues, offered by Ameano Peptides in a research-grade formulation.” (sha256 a878996b3b4ff350)
87. [Delta Sleep-Inducing Peptide (DSIP) — did it affect your prescription stimulants?](https://www.reddit.com/r/ADHDers/comments/1shiytb/delta_sleepinducing_peptide_dsip_did_it_affect/) — “I have no experience of or knowledge of DSIP.” (sha256 a399debf5f232e8d)
88. [Are peptides back?](https://x.com/HillaryLinMD/status/2071602085401866272) — “Emideltide / DSIP: D+ for sleep/withdrawal/pain” (sha256 fbc9cc9230836d1e)
89. [DSIP experience with blend](https://x.com/xiipercent/status/2071641514263130279) — “I def feel from DSIP 10mg ; +a tesa/ipa 10/10mg blend. I feel like my own anesthesiologist- straight to sleep.” (sha256 07ad44235fff6a68)
90. [Peptide FDA discussion](https://x.com/PeptideBuz/status/2071576099931459677) — “July 24: Emideltide (DSIP), Semax, Epitalon. Seven peptides total. These aren't being "approved" — they're being evaluated for return to Category 1 compounding status.” (sha256 2707060e15e2c9de)
91. [DSIP stack mention](https://x.com/xiipercent/status/2071614893732900958) — “DSIP. + tesa/ipa blend. your welcome” (sha256 9f007ac1f49f22db)
92. [DSIP sourcing anecdote](https://x.com/AMRadio84/status/2071613491719319677) — “Same here. Grok ruined my Epithalon & DSIP into Peptides. Had to toss them now I use a well known influencer cheat sheet. All is well.” (sha256 753d0871a72e1acf)
93. [Actual peptides / meds that will give you deep sleep?](https://www.reddit.com/r/sleep/comments/1l1zbhz/actual_peptides_meds_that_will_give_you_deep_sleep/) — “YMMV. I've had the worst insomnia from it, tried different brands and dosages over the years. On par with melatonin.. and other 100+ supplements / meds / peptides that either do nothing or worsen my sleep” (sha256 9e5d74aef6a81185)
94. [Actual peptides / meds that will give you deep sleep?](https://www.reddit.com/r/sleep/comments/1l1zbhz/actual_peptides_meds_that_will_give_you_deep_sleep/) — “Yeah it made my sleep worse I tried it 3 times.” (sha256 db44ce3d19e2e458)
95. [Actual peptides / meds that will give you deep sleep?](https://www.reddit.com/r/sleep/comments/1l1zbhz/actual_peptides_meds_that_will_give_you_deep_sleep/) — “Same here. DSIP shots made my sleep a lot worse” (sha256 4ab8ba96a1fe94af)
96. [Actual peptides / meds that will give you deep sleep?](https://www.reddit.com/r/sleep/comments/1l1zbhz/actual_peptides_meds_that_will_give_you_deep_sleep/) — “I take it and it does not affect sleep time or deep sleep but no matter how little sleep I get, there is always REM and that was not the case pre-DSIP.” (sha256 d166b5d378b9e73e)
97. [DSIP Intranasal/Sub-Q Complete Opiate Withdrawal Relief](https://www.reddit.com/r/Nootropics/comments/1nnfj2w/dsip_intranasalsubq_complete_opiate_withdrawal/) — “Current dosage is about 1mg at a time sub-q or 50mcg per nostril. ... Sub-q DSIP provides sustained complete withdrawal relief. Intranasal provides more rapid and pronounced, but shorter lived withdrawal relief.” (sha256 13891c7e4b1069cc)
98. [How long does a reconstituted DSIP vial actually last in the fridge?](https://www.reddit.com/r/Biohacking/comments/1rwy37j/how_long_does_a_reconstituted_dsip_vial_actually/) — “I’m running 250 mcg (6.25 units on a U-100 syringe) Monday through Friday and taking weekends off. ... First night (250 mcg DSIP): slept over 6 hours — super smooth and consolidated the whole way... 250 mcg was clearly the winner my overall rest and recovery” (sha256 e639d6f8c720eb6d)
99. [DSIP: Comprehensive Guide](https://www.reddit.com/r/APRHealthSolutions/comments/1q56i5l/dsip_comprehensive_guide/) — “DSIP is commonly studied for: Deep sleep and slow-wave sleep enhancement. Nighttime recovery and regeneration. Stress and overtraining models.” (sha256 1369dcf9a9617f68)
100. [DSIP ( delta sleep inducing peptide ): no effect whatsoever](https://www.reddit.com/r/Peptides/comments/h0j7cv/dsip_delta_sleep_inducing_peptide_no_effect/) — “DSIP ( delta sleep inducing peptide ): no effect whatsoever. I've tried 125mcg (day time) and ~300mcg (pre sleep). I felt no effects at all ...” (sha256 82075a83cb88f34b)
101. [any personal experience with DSIP (Delta Sleep-Inducing Peptide)?](https://www.reddit.com/r/sleephackers/comments/1ag716c/any_personal_experience_with_dsip_delta/) — “I am sleeping through the night MUCH better after a few doses of DSIP.” (sha256 0c9c8a46ae7b1efb)
102. [X post listing peptides including DSIP](https://x.com/gr8tful88/status/2071404994192974208) — “Sleep: DSIP, Epitalon.” (sha256 bce0c17085990d77)
103. [Effect of delta sleep inducing peptide (DSIP) and arginine vasotocin (AVT) on sleep and motor activity in the rat — Tobler I, Borbely AA. Waking Sleeping. 1980;4(2):139-53. PMID 7405185](https://pubmed.ncbi.nlm.nih.gov/7405185/) — “It is concluded that neither DSIP nor AVT qualify as a specific sleep-promoting substance.” (sha256 96b42d93da1df78a)
104. [Characterization of a delta-electroencephalogram (-sleep)-inducing peptide — Schoenenberger GA, Monnier M. Proc Natl Acad Sci USA. 1977;74(3):1282-6. PMID 265572](https://pubmed.ncbi.nlm.nih.gov/265572/) — “Amino acid sequence: Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu. A total of 58 rabbits including controls were evaluated. Only the delta-sleep-inducing peptide (synthetic) showed significant and specific enhancement/induction of delta and spindle electroencephalogram patterns.” (sha256 404b2d22bdd4dafd)
105. [Humoral transmission of sleep IX: activity and concentration of the sleep peptide delta in cerebral and systemic blood fractions — Monnier M, Dudler L, Gachter R, Schoenenberger GA. Pflugers Arch. 1975;360(3):225-42. PMID 1237876](https://pubmed.ncbi.nlm.nih.gov/1237876/) — “The electric thalamic stimulation of donors, with parameters inducing orthodox delta-sleep, parallely increases the delta peptide concentration (160 nM/g) and its activity (543 muV x sec delta integral) in cerebral blood dialysate.” (sha256 facf9bcba14ad6d5)
106. [The delta EEG (sleep)-inducing peptide (DSIP) XI: amino-acid analysis, sequence, synthesis and activity of the nonapeptide — Schoenenberger GA, Maier PF, Tobler HJ, Wilson K, Monnier M. Pflugers Arch. 1978;376(2):119-29. PMID 568769](https://pubmed.ncbi.nlm.nih.gov/568769/) — “The mean increase of EEG delta activity reached 35% in the neocortex and limbic cortex as compared to control animals receiving CSF-like solution or any of the other 8 peptides.” (sha256 f80e4d734ae93faa)
107. [Study of delta sleep-inducing peptide efficacy in improving sleep on short-term administration to chronic insomniacs — Monti JM, Debellis J, Alterwain P, Pellejero T, Monti D. Int J Clin Pharmacol Res. 1987;7(2):105-10. PMID 3583493](https://pubmed.ncbi.nlm.nih.gov/3583493/) — “For NREM sleep time and stage 2 sleep differences between DSIP and a placebo were significant, but the same differences existed already for the baseline values. It can be concluded that sleep improvement under DSIP treatment is of little clinical significance.” (sha256 03531a3317d65abe)
108. [Efficacy of DSIP to normalize sleep in middle-aged and elderly chronic insomniacs — Schneider-Helmert D. Eur Neurol. 1986;25(6):448-53. PMID 3792404](https://pubmed.ncbi.nlm.nih.gov/3792404/) — “The population of 18 chronic psychophysiological insomniacs was subdivided into two groups of middle-aged (29-59) and older (60-83) insomniacs. The whole sample of insomniacs showed normal sleep patterns at the end of the investigation.” (sha256 dc1c3a6cc2148717)
109. [Successful treatment of withdrawal symptoms with delta sleep-inducing peptide, a neuropeptide with potential agonistic activity on opiate receptors — Dick P, Grandjean ME, Tissot R. Neuropsychobiology. 1983;10(4):205-8. PMID 6328354](https://pubmed.ncbi.nlm.nih.gov/6328354/) — “DSIP (25 nmol/kg) was injected intravenously as sole treatment to 67 patients presenting withdrawal symptoms (28 from ethyl alcohol, 39 from opiates). 27% of the patients were lost or unsuitable for evaluation. From the 49 evaluable patients, DSIP produced a beneficial effect in 48.” (sha256 5957db77bfae5754)
110. [DSIP in the treatment of withdrawal syndromes from alcohol and opiates — Dick P, Costa C, Fayolle K, Grandjean ME, Khoshbeen A, Tissot R. Eur Neurol. 1984;23(5):364-71. PMID 6548969](https://pubmed.ncbi.nlm.nih.gov/6548969/) — “DSIP was administered intravenously to 107 inpatients presenting with symptoms of alcohol (n = 47) or opiate (n = 60) withdrawal. The assessment of effect was based on the clinical evaluation by the physician and the nursing staff.” (sha256 53fceb737b4862c0)
111. [Opioid detoxification with delta sleep-inducing peptide: results of an open clinical trial — Backmund M, Meyer K, Rothenhaeusler HB, Soyka M. J Clin Psychopharmacol. 1998;18(3):257-8. PMID 9617990](https://pubmed.ncbi.nlm.nih.gov/9617990/) — “Open clinical trial of DSIP in opioid detoxification; no placebo control and no blinding.” (sha256 cd1859c67ea76b5a)
112. [Development of an enzyme immunoassay for delta sleep-inducing peptide (DSIP) and its use in the determination of the metabolic clearance rate of DSIP administered to dogs — Kato N, Honda Y, Ebihara S, Naruse H, Takahashi Y. Neuroendocrinology. 1984;39(1):39-44. PMID 6379493](https://pubmed.ncbi.nlm.nih.gov/6379493/) — “DSIP was found to have a rapid disappearance with a mean metabolic clearance rate of 30.7 +/- 2.5 ml/kg . min and a mean half-life of 4.0 +/- 0.7 min in the dogs. Additional measurement in a monkey and 3 rats revealed a rapid in vivo clearance of DSIP from plasma with a half-life of 2.9 and 2.0 +/- 0.54 min, respectively.” (sha256 464e4a6b0d57843e)
113. [Degradation and aggregation of delta sleep-inducing peptide (DSIP) and two analogs in plasma and serum — Graf MV, Saegesser B, Schoenenberger GA. Peptides. 1987;8(4):599-603. PMID 3628078](https://pubmed.ncbi.nlm.nih.gov/3628078/) — “It was concluded that the rapid disappearance of injected DSIP in blood was due to degradation, whereas complex formation together with slower degradation resulted in longer persistence of apparently intact analogs.” (sha256 ef25e6e8f9f903de)
114. [Delta sleep-inducing peptide administration does not influence growth hormone and prolactin secretion in normal women — Giusti M, Carraro A, Porcella E, Valenti S, Nicora D, Sessarego P, Giordano G. Psychoneuroendocrinology. 1993;18(1):79-84. PMID 8475226](https://pubmed.ncbi.nlm.nih.gov/8475226/) — “Serum GH and PRL levels were normal under basal conditions and no effects were noted after the infusion of DSIP. The GH and PRL circadian rhythm was not modified by DSIP administration.” (sha256 464297c20846b682)
115. [Delta sleep-inducing peptide (DSIP) stimulates LH release in steroid-primed ovariectomized rats — Sahu A, Kalra SP. Life Sci. 1987;40(12):1201-6. PMID 3550343](https://pubmed.ncbi.nlm.nih.gov/3550343/) — “While intraventricular administration of DSIP (2 or 10 micrograms) failed to affect LH release in ovariectomized rats, in two separate experiments DSIP promptly stimulated LH release in ovariectomized estrogen, progesterone-primed rats. However, DSIP had no effect on either basal or LHRH-induced in vitro LH release from the hemipituitaries.” (sha256 a64aedffc026c2a1)
116. [The influence of delta sleep-inducing peptide on functional state of rats hepatocytes in foot-shock stress — Belykh AE, Bobyntsev II, Kryukov AA, Dudka VT. Ross Fiziol Zh Im I M Sechenova. 2015;101(6):700-7. PMID 26470489](https://pubmed.ncbi.nlm.nih.gov/26470489/) — “It was observed that 120 mcg/kg peptide normalized the elevation of malondialdehyde (MDA) level in the liver homogenate caused by acute foot-shock stress. Peptide in all doses provided the normalization of protein synthetic hepatocyte function.” (sha256 3d645f09fe035c71)
117. [Antiepileptic activity of delta sleep-inducing peptide and its analogue in metaphit-provoked seizures in rats — Stanojlovic OP, Zivanovic DP, Mirkovic SD, Mikhaleva II. Seizure. 2005;14(4):240-7. PMID 15911358](https://pubmed.ncbi.nlm.nih.gov/15911358/) — “DSIP and DSIP-12 significantly increased in delta and theta frequency bands and decreased the incidence, mean seizure grade and duration of metaphit convulsions.” (sha256 c24e8cd6f0e85122)
118. [Antagonism of the effect of delta sleep-inducing peptide by naloxone in the rat — Young AM, Key BJ. Neuropharmacology. 1984;23(11):1347-50. PMID 6549349](https://pubmed.ncbi.nlm.nih.gov/6549349/) — “This sleep promoting effect was blocked by pre-treatment with the opiate antagonist naloxone at a dose level (0.1 mg/Kg s.c.) considered selective for mu-receptors.” (sha256 a0033b30414d8291)
119. [Some pharmacological effects of delta-sleep-inducing peptide (DSIP) — Scherschlicht R, Aeppli L, Polc P, Haefely W. Eur Neurol. 1984;23(5):346-52. PMID 6548967](https://pubmed.ncbi.nlm.nih.gov/6548967/) — “In cats, 25 micrograms x kg-1 i.v. and 100 micrograms x kg-1 s.c. preferentially augmented REM sleep. In most experimental situations, indications for bell-shaped dose-response curves of DSIP were found.” (sha256 b659e9e7ab494f93)
120. [Characterization, properties and multivariate functions of delta-sleep-inducing peptide (DSIP) — Schoenenberger GA. Eur Neurol. 1984;23(5):321-45. PMID 6548966](https://pubmed.ncbi.nlm.nih.gov/6548966/) — “I.c.v., i.v. and s.c. administration yielded, in contrast to pharmaka, a parabolic dose-response curve with different effective optima. The half-life time for proteolytic split-off of tryptophan by brain slices and homogenates is 15 min.” (sha256 e7a7808ca428e241)
121. [ClinicalTrials.gov API v2 query for "delta sleep-inducing peptide" and for emideltide, run 4 August 2026](https://clinicaltrials.gov/api/v2/studies?query.term=%22delta+sleep-inducing+peptide%22&countTotal=true) — “totalCount: 0. Separate queries for the term "emideltide" and for DSIP as a registered intervention also returned totalCount 0 — no registered clinical trial of the compound exists in the registry.” (sha256 4be9ad72e9e7423a)
122. [FDA — Certain Bulk Drug Substances for Use in Compounding That May Present Significant Safety Risks; table: Bulk drug substances nominated but withdrawn](https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks) — “Emideltide (DSIP): Compounded drugs containing emideltide may pose risk for immunogenicity for certain routes of administration and may have complexities with regard to peptide-related impurities and API characterization. FDA has not identified safety-related information regarding emideltide for the proposed route of administration. Therefore, the agency lacks sufficient information to know whether the drug would cause harm if administered to humans.” (sha256 b57573e70de9683e)
123. [The Pain of Sleep Loss: A Brain Characterization in Humans — Krause AJ, Prather AA, Wager TD, Lindquist MA, Walker MP. J Neurosci. 2019;39(12):2291-2300. PMID 30692228](https://pubmed.ncbi.nlm.nih.gov/30692228/) — “Sleep deprivation expands the temperature range for classifying a stimulus as painful, specifically through a lowering of pain thresholds. Even modest nightly changes in sleep quality (increases and decreases) within an individual determine consequential day-to-day changes in experienced pain.” (sha256 367a1161b4ab506a)
124. [Experimental Sleep Restriction Facilitates Pain and Electrically Induced Cortical Responses — Matre D, Hu L, Viken LA, et al. Sleep. 2015;38(10):1607-17. PMID 26194577](https://pubmed.ncbi.nlm.nih.gov/26194577/) — “Pain testing was performed after 2 nights of 50% sleep restriction and after 2 nights with habitual sleep. Pressure pain threshold of the trapezius muscle region also decreased after SR (P = 0.017).” (sha256 5dece3aca12b8593)
125. [The association of sleep and pain: an update and a path forward — Finan PH, Goodin BR, Smith MT. J Pain. 2013;14(12):1539-52. PMID 24290442](https://pubmed.ncbi.nlm.nih.gov/24290442/) — “A key trend emerging from population-based longitudinal studies is that sleep impairments reliably predict new incidents and exacerbations of chronic pain. Sleep impairments are a stronger, more reliable predictor of pain than pain is of sleep impairments.” (sha256 719d24f7729f704c)
126. [Sleep fragmentation delays wound healing in a mouse model of type 2 diabetes — McLain JM, Alami WH, Glovak ZT, et al. Sleep. 2018;41(11):zsy156. PMID 30107617](https://pubmed.ncbi.nlm.nih.gov/30107617/) — “Days to achieve 50 per cent wound healing were 13.3 +/- 0.4 with sleep fragmentation compared with 10.3 +/- 0.7 without sleep fragmentation.” (sha256 2bd04f9d393174e5)
127. [Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis — Trauer JM, Qian MY, Doyle JS, Rajaratnam SM, Cunnington D. Ann Intern Med. 2015;163(3):191-204. PMID 26054060](https://pubmed.ncbi.nlm.nih.gov/26054060/) — “At the posttreatment time point, SOL improved by 19.03 (95% CI, 14.12 to 23.93) minutes, WASO improved by 26.00 (CI, 15.48 to 36.52) minutes, and SE% improved by 9.91% (CI, 8.09% to 11.73%). No adverse outcomes were reported.” (sha256 6b15df85de874ab6)
128. [Comparative effects of pharmacological interventions for the acute and long-term management of insomnia disorder in adults: a systematic review and network meta-analysis — De Crescenzo F, et al. Lancet. 2022;400(10347):170-184. PMID 35843245](https://pubmed.ncbi.nlm.nih.gov/35843245/) — “We included 170 trials (36 interventions and 47,950 participants). In terms of acute treatment, benzodiazepines, doxylamine, eszopiclone, lemborexant, seltorexant, zolpidem, and zopiclone were more efficacious than placebo (SMD range 0.36-0.83). Melatonin, ramelteon, and non-licensed drugs did not show overall material benefits.” (sha256 50b1f942cf3c7407)
129. [Delta sleep-inducing peptide (DSIP): a still unresolved riddle — Kovalzon VM, Strekalova TV. J Neurochem. 2006;97(2):303-9. PMID 16539679](https://pubmed.ncbi.nlm.nih.gov/16539679/) — “The link between DSIP and sleep has never been further characterized, in part because of the lack of isolation of the DSIP gene, protein and possible related receptor. Thus the hypothesis regarding DSIP as a sleep factor is extremely poorly documented and still weak.” (sha256 f83176775a6fa57c)
130. [Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions — Rahman OF, Lee SJ, Seeds WA. J Am Acad Orthop Surg Glob Res Rev. 2026;10(1):e25.00236. PMID 41490200](https://pubmed.ncbi.nlm.nih.gov/41490200/) — “Recovery-enhancing agents such as epithalon, delta sleep-inducing peptide, and pinealon target circadian and mitochondrial regulators. Although preclinical studies are promising, there is a current lack of clinical trials.” (sha256 557add16c209b9a4)
131. [Evidence for a role of delta sleep-inducing peptide in slow-wave sleep and sleep-related growth hormone release in the rat — Iyer KS, Marks GA, Kastin AJ, McCann SM. Proc Natl Acad Sci USA. 1988;85(10):3653-6. PMID 3368469](https://pubmed.ncbi.nlm.nih.gov/3368469/) — “Male rats were deprived of sleep for 4 hr by placing them on a slowly rotating wheel. These increases were blocked by microinjection into the third cerebral ventricle of highly specific antiserum to DSIP.” (sha256 bb58c167da106e33)
132. [Effects of sleep deprivation, nicotine, and selenium on wound healing in rats — Gumustekin K, Seven B, Karabulut N, et al. Int J Neurosci. 2004;114(11):1433-42. PMID 15636354](https://pubmed.ncbi.nlm.nih.gov/15636354/) — “The number of fibroblasts and capillary vessels were higher in control and Se groups than in sleep deprivation and nicotine groups. The results suggest that sleep deprivation and nicotine may delay wound healing.” (sha256 f6abb313b089b6c7)