NMN has gained a lot of attention lately, especially after the release of David Sinclair’s book Lifespan. In his book, the Ph.D. and longevity scientist discusses his research examining NMN, particularly in mice. He has been very open about taking NMN, but has also made it clear that he has no opinion on whether anyone else should take the supplement. Similar to NR, the research in animal studies looks promising, but the first study in humans was only published this year. Phase I of this study merely assessed the safety of NMN supplementation, and therefore NAD+ levels were not even measured. Ten healthy Japanese men received a single dose of 100mg, 250mg, and 500mg of NMN on separate occasions. All quantities were tolerated without adverse side effects. The authors concluded that up to 500mg of NMN is safe in healthy men. For phase II, researchers will reportedly examine the efficacy of NMN, as well as appropriate dosage and frequency; however, it remains unclear if this study has started.
Other ongoing human trials (like this one) will examine the safety and effects of NMN in older adults, while this one will investigate NMN’s impact on cardiovascular and metabolic functions. But, similar to NR, research is preliminary and more studies are needed to draw further conclusions.
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