NMN

Supplements · Antioxidants · Supplement, Typed Supps

Something your body turns into a helper molecule every cell needs.

Stage by stage

Intake (Capsule): Absorption and digestive survival is still an active area of research.
Small intestine (Absorption still studied): Absorption and how intact it survives digestion is still an active area of research.
Bloodstream (Converted toward NAD+): Converted toward NAD+, a coenzyme involved in energy metabolism and cellular repair that naturally declines with age.
Cellular repair (Still being studied in humans): Downstream effects in humans are still being studied.

What the evidence supports

Raising NAD+ levels and improving physical function such as walking endurance — limited evidence. Small randomised trials show NMN raises blood NAD+ markers and modestly improves walking-test distance, but they are short and few.
Slowing ageing or extending healthspan — insufficient evidence. The anti-ageing rationale is largely from rodents; no human trial has demonstrated a longevity or healthspan endpoint.
Evidence on Short-term safety and tolerability — limited evidence. Trials up to 900 mg/day report good tolerability over weeks to a couple of months, but longer-term human safety is untested.

Typical dose

250–900 mg daily

Upper limit: No established UL

Timing

With food, standard dosing.

Time to effect

Unclear: Most robust evidence so far comes from animal studies rather than long-term human trials.

Common myth

“NMN supplements slow ageing in humans.” In reality: The animal research is promising, but large, long-term human trials confirming the same effects don’t yet exist.