NMN: what is actually proven

NMN is a substance the body can use to make NAD+. NAD+ is part of the cells' energy metabolism and declines with age. That is why NMN is sold as a longevity supplement. The chain itself makes sense. The conclusion often printed on the jar does not.

What is proven in humans is above all that NAD+ in the blood can rise when you take NMN or closely related precursors such as NR. The studies are short — often a few weeks to a few months. A higher level in the blood is a measurement. It is not evidence that life gets longer, that disease is postponed, or that energy comes back.

There the evidence ends. There is not enough to say which dose is right for a given person, how long it is reasonable to take, or what happens after the first year. A text that sets a dose and calls it clinically proven for a longer life translates a measurement into a promise. That translation is not valid.

Read the contents and the dose on the package, not in the ad. Check that it says NMN and how much there is per serving. Skip claims about lifespan, biological age, or that stomach acid destroys ordinary NMN, unless the manufacturer can show it in humans for that specific product.

Exercise acts on the same system. A supplement does not replace sleep, strength and conditioning in the protocols on this site. If you already train and sleep badly, NMN is not the next step. Sleep is.

Do not take NMN to treat anything. Talk to a doctor if you take medication or have an illness. This text is not a recommendation to buy.