Best NAD+ Precursor (NR) for Longevity
Top 4 products ranked
Last reviewed May 2026
Clinical dose: 250–1000 mg
Why NAD+ Precursor (NR) for Longevity
NAD+ Precursor (NR) plays a supporting role in longevity. NR is a form of vitamin B3 and a precursor to NAD+, a coenzyme essential for energy metabolism, DNA repair, and sirtuin activation. NAD+ levels decline ~42% between ages 30–70.
What dose to look for
Clinical studies typically use 250–1000 mg of nad+ precursor (nr). Most human studies use 250–1000 mg/day. 300 mg is the most common consumer dose. Clinical trials typically use 1000 mg/day (500 mg twice daily). Products below this range may not deliver meaningful results.
What the research says
NAD+ Precursor (NR) has moderate clinical evidence for longevity benefits. Several human trials confirm it raises NAD+ levels dose-dependently, but health outcomes still emerging Learn more
