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SupplementNMN / NAD+
NMN and NR are supplements meant to raise the molecule NAD+ in your cells. NAD+ is needed for energy and repair and declines with aging, which makes them popular in longevity circles.
NMN / NAD+ at a glance
WorksUnproven in humansPreliminary
TheoryNAD+ falls, topping up helps
EvidenceMostly mice
SafeSeems so short termPreliminary
70 studies14 answersupdated jul 2026
Evidence per claim
Not yet proven effective in humans
View evidence →NAD+ declines with age, topping up is the theory
View evidence →Sirtuins, the intended target, are uncertain
View evidence →Healthy aging is the real goal, not just longer
View evidence →Practical use
For whom
People who follow the newest longevity supplements and accept the uncertainty.
Not for whom
If you want proven effect: put your money on exercise, sleep and diet first.
Usual dose
No proven optimal dose in humans; use is experimental.
Key caveats
Lots of marketing, little hard human data; short-term safety seems okay but long term is unknown.
What we know, and don't
Known
NAD+ declines with age
Promising in animal studies
Short-term use seems safe
Not yet
Whether it makes humans healthier or live longer
The best form and dose
The long-term effects
Common misconceptions
"NMN is proven anti-aging."
Not shown. In humans that is not yet shown.Strong evidence
"More NAD+ is always better."
Incomplete. That is not proven and possibly not without risk.Preliminary evidence
How NMN / NAD+ connects