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    "## Overview\nEvidence is being populated by Grok web search."
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      "url": "https://pubmed.ncbi.nlm.nih.gov/37971292/",
      "title": "Evaluation of safety and effectiveness of NAD in different clinical conditions: a systematic review",
      "quote": "This review includes 10 studies, with a total of 489 participants. ... NADH supplementation is safe and has a low incidence of side effects. Future investigations are needed to evidence the clinical benefits regarding specific diseases and doses administered.",
      "summary": "2024 systematic review of RCTs on NAD+/NADH supplementation safety and efficacy across conditions like CFS, Parkinson's, Alzheimer's; concludes well-tolerated with some benefits in quality of life and parameters, low side effects.",
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      "url": "https://pubmed.ncbi.nlm.nih.gov/41655607/",
      "title": "NAD⁺ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence",
      "quote": "We identified 113 eligible studies: 33 human intervention studies (28 randomized; 5 nonrandomized) and 80 rodent studies. ... Overall, NAD⁺ augmentation shows clear biological activity, but clinical effectiveness for anti-aging or wellness outcomes remains inconclusive.",
      "summary": "2026 PRISMA systematic review of 113 studies (up to Oct 2025) on NAD+ precursors; strong preclinical effects, human trials show NAD boosting and tolerability but heterogeneous/inconclusive functional outcomes; calls for larger trials.",
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      "title": "Effects of NAD+ supplementation with oral nicotinamide riboside on vascular health and cognitive function in older adults with peripheral artery disease: Results from a pilot 4-week open-label clinical trial",
      "quote": "Preliminary results indicate a positive trend in peripheral endothelial function, significant improvements in cerebrovascular response in the left dorsolateral prefrontal cortex, and cognitive enhancement across multiple domains postsupplementation. ... These findings suggest that NR supplementation could ameliorate cognitive outcomes in older adults with PAD.",
      "summary": "2025 pilot open-label trial (NCT06534944) of NR in 8 older PAD patients; showed trends/improvements in endothelial function, cerebrovascular responses, cognition, and in vitro endothelial benefits via reduced oxidative stress.",
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      "quote": "This study has confirmed that supplementation with NAD+ can enhance cardiac function in patients with from HF due to ICM, thereby affirming its beneficial impact on cardiac performance.",
      "summary": "2026 RCT showing IV NAD+ improves LVEF and trends toward better outcomes in heart failure patients.",
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      "title": "The differential impact of three different NAD+ boosters on circulatory NAD and microbial metabolism in humans",
      "quote": "Here we show in a randomized, open-label, placebo-controlled study in 65 healthy participants that 14 days of supplementation with NR and NMN, but not Nam, comparably increases circulatory NAD + concentrations in healthy adults.",
      "summary": "2026 RCT comparing NR, NMN, and Nam effects on NAD levels and gut microbiota.",
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      "title": "NAD+ precursor supplementation in human ageing: clinical evidence and challenges",
      "quote": "In this Review, we evaluate the clinical evidence supporting the notion that NAD + levels decline with age, as well as the tissue-specific effects of NAD + precursor supplementation in humans.",
      "summary": "Recent review on clinical evidence for NAD+ precursors in aging.",
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      "quote": "Supplementation with NAD + and its precursors is commonly used to prevent age-related disease and extend healthspan.",
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