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Do NMN and NAD+ supplements reverse ageing?
They raise NAD in the blood, but human trials show no clear anti-ageing or muscle benefit.
What you hear: “NMN or NAD+ supplements and drips raise NAD levels and reverse ageing.”
What the studies found
A 2026 review of 33 human studies found oral NR and NMN reliably raise NAD-related markers in the blood, but effects on real health outcomes were mixed and often null; no outcome trials of NAD+ drips or injections exist. A pooled analysis of trials in adults over 60 found NMN made no difference to muscle mass, grip strength or walking speed (walking speed difference -0.01, essentially zero). The striking anti-ageing results come from mice.
What you could do
Treat NAD boosters as an experiment with no proven payoff; exercise and sleep have far better evidence for healthy ageing.
Get your longevity score and see which everyday habits make the biggest difference for you.
Not medical advice. General information from published studies, not a diagnosis or a treatment plan. Talk with your doctor before starting a supplement or changing a medicine, especially if you are pregnant, take other medicines or have a health condition.
How we judged it
Partly true: Some truth, but oversold as usually said. We judge the claim as it is usually said online, not the habit itself. Trials assign people at random, so they can show cause; observed studies follow people and show a link, not proof. Last checked: October 2026.
The studies, in their own words
- Gallagher and Emmanuel. Ageing Res Rev 2026
Overall, NAD⁺ augmentation shows clear biological activity, but clinical effectiveness for anti-aging or wellness outcomes remains inconclusive.
- Prokopidis et al. J Cachexia Sarcopenia Muscle 2025
Current evidence does not support NMN and NR supplementation for preserving muscle mass and function in adults with mean age of over 60 years.
- Yang et al. Nutrients 2026
NMN did not increase overall, serious, withdrawal-related, or system-specific adverse events ... No significant effects were observed on body weight, BMI, fasting glucose, HbA1c, lipid profiles, or systolic blood pressure.
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