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Ketamine for late-life depression: a systematic review of efficacy, safety, and tolerability

N.UlasT.et al

Nat Commun (2021) 12(1):2244

Importantly, supplementation can **increase** measurable NAD+ metabolism: in a 2018 randomized, placebo-controlled crossover trial published in Nature Communications by Martens and colleagues at the University of Colorado Boulder (24 healthy middle-aged and older adults), 1,000 mg/day of the NAD+ precursor nicotinamide riboside (500 mg, twice daily) elevated NAD+ in blood cells by roughly 60% versus placebo over 6 weeks, with no serious adverse events reported

S.TokarevJ.ColtonS.et al (2012)