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2.5/5 Weak evidence

Focus / nootropic evidence brief

NAD+ precursors

NR and NMN can raise NAD-related biomarkers, but direct gym-performance evidence is early and not yet strong enough for broad recommendation.

Longevity hype early endurance / health 6 linked sources Content audit 2026-05-04

Headline Finding

NMN/NR trials can raise biomarkers; exercise and muscle-function outcomes remain early, mixed, and population-specific.

Dose Context

Products vary between NR, NMN, niacin, nicotinamide, and blends; dosing and legal availability differ by market.

Important Caveat

Energy, anti-aging, and endurance guarantees are not supported; athlete data are limited and product regulation is unsettled.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-04
  1. Trial NMN amateur runner RCT
  2. Trial JISSN NMN RCT
  3. Trial NAD precursor muscle-function RCT
  4. Trial NR obese men RCT
  5. Trial NR body-composition RCT full text
  6. Review NR limitations review

How To Read This Rating

The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.

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