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Nicotinamide Mononucleotide
NAD+ precursor that reliably raises blood NAD+; human functional benefits (energy, physical performance, metabolism) are still modest and mixed.
What the evidence says
NMN doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality meta-analyses and randomised trials published 1993–2026 with a typical study size of 32 participants.
Based on 42 studies · 8 meta-analyses · 22 RCTs · 2,427 total participants
Confidence
High confidenceWhat the studies found
By outcome
RCTs reliably raise blood NAD+ and a meta-analysis found modest gait-speed gains, but functional benefits are inconsistent and meta-analyses of muscle, glucose and lipid outcomes split or are null, holding it to Moderate.
18 randomised trials
83% were about NMN in an audit of 18 of them
Every randomised or controlled trial of NMN indexed in PubMed, not a hand-picked subset. Meta-analyses and systematic reviews are deliberately excluded from this count: most of them cover many compounds at once, so counting them would inflate it.
PubMed · as of Sep 2026
16 trials ongoing or recruiting · 17 completed on ClinicalTrials.gov
1 of the completed trials have posted results
Registered trials show research momentum for NMN, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
NMN (Nicotinamide Mononucleotide) is a precursor to NAD+, a coenzyme essential for cellular energy production and DNA repair that declines with age. Multiple RCTs consistently show NMN raises blood NAD+ levels in humans — but that is a surrogate marker.
Evidence for downstream functional benefits is thinner and inconsistent: some small trials report modest improvements in walking/gait speed, while meta-analyses split (one finds muscle/liver benefit, another finds no support for preserving muscle mass), and trials of glucose and lipid metabolism have been largely null.
Competes with NR (Nicotinamide Riboside) as a NAD+ boosting strategy.
Converts to NAD+, essential for cellular energy
Provides fuel for longevity proteins
Supports cellular repair mechanisms
How NMN works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Avoid due to insufficient safety data
Consult oncologist; theoretical concerns exist
Limited interaction data available
Tip: Usually transient
Tip: Take with food
NMN has an evidence score of 5.5/10 — moderate evidence based on 42 indexed studies, including 3 meta-analyses. NAD+ precursor that reliably raises blood NAD+; human functional benefits (energy, physical performance, metabolism) are still modest and mixed. Representative study: PMID 39185644.
The commonly studied dose of NMN is 250-500mg. Research points to an estimated optimal dose around 600mg, with a minimum effective dose near 250mg. Individual response varies — start low and adjust.
The best time to take NMN is in the morning. Taking it with food is preferred. NMN (nicotinamide mononucleotide) is a direct NAD+ precursor.
NMN has a safety rating of "moderate". That is a category, not a measure of individual risk, and there are precautions worth knowing. Reported side effects are uncommon and include mild GI upset, flushing (rare). Use caution if any of these apply to you: Cancer (theoretical concern about fueling cancer cell metabolism).
CoQ10
Likely helpsA lipid-soluble antioxidant central to mitochondrial energy production, with the strongest trial support for fertility/IVF outcomes and heart failure.
Caffeine
Probably helpsBlocks adenosine receptors to boost alertness, reaction time, and endurance — an umbrella review of 21 meta-analyses found it ergogenic for endurance, strength and power.
Huperzine A
Too few graded studiesAcetylcholinesterase inhibitor from club moss, studied mainly for Alzheimer's and dementia; cognitive evidence is mixed and limited by trial quality.
Urolithin A
Too few graded studiesPostbiotic that triggers mitophagy — the cleanup of damaged mitochondria — to support muscle health and cellular energy.
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Reviewed by Dr. Baher Al Hakim · Last reviewed May 2026 · evidence from 42 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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