NR Reference

Plain English

What it is

Nicotinamide riboside (sold as Niagen or Tru Niagen) is a form of vitamin B3 that the body turns into NAD+, a helper molecule cells use to make energy. It is sold as a dietary supplement, not an FDA-approved medicine. The FDA has reviewed it as safe for use in food and supplements (called GRAS, plus new-dietary-ingredient notices with no objection), so its supplement status is settled.

What people use it for

People take it hoping to raise their NAD+ levels and support energy, healthy aging, and sharper thinking. It is one of the two main NAD+ precursor supplements, alongside NMN, and it has a larger human safety record than NMN.

What the science shows

Human trials show it does reliably raise NAD+ markers in the blood and that it is generally well tolerated, with no serious problems reported in short studies. But solid proof that it improves memory, thinking, or how long or how healthy people live is still missing. A recent trial found no real boost in cognition compared with a placebo.

The catch

Raising an NAD+ lab number is not the same as feeling or living better. Long-term outcome data in healthy people is limited, and the cognitive and anti-aging claims remain largely unproven.

Reference summary

Larger human safety database than NMN. Pilot trials report increased blood NAD+ markers; long-term outcome data are limited.

Regulatory and posture

Categories

Nootropic, Longevity, Metabolic

Aliases

Nicotinamide riboside, Niagen, Tru Niagen

Evidence posture

human - Sold as a dietary supplement, not as an FDA-approved drug. Effects on cognition / longevity surrogates are reported in small trials. Long-term outcome data in healthy adults is absent.

Regulatory status

No FDA-approved NR drug label. Niagen has GRAS / NDI status with FDA. Sold as a dietary supplement (Tru Niagen, others).

Content review status

research reference