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SupplementNMN / NAD+
Also: nad+, nicotinamide riboside, nr
Last scientific update: jun 2026
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
NMN and NAD+ boosters are popular and promising in animals, but health benefit in humans is not yet shown.
30 studies4 answersupdated jun 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