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The turnover of the oxidized form of nicotinamide adenine dinucleotide (NAD + ) has attracted interest in regard to longevity. Thus, compounds that can rapidly increase the cellular NAD + concentration have been surveyed by many researchers. Of those, β-nicotinamide mononucleotide (β-NMN) has been focused on. Studies on the biosynthesis of NAD + from β-NMN have been reported at the cellular level, but not at the whole animal level. In the present study, we investigated whether β-NMN is superior to nicotinamide (Nam) as a precursor of NAD + in whole animal experiments. To this end we compared the NAD + concentration in the blood and the urinary excretion amounts of NAD + catabolites. Rats were intraperitoneally injected with β-NMN or Nam. After the injection, blood samples and urine samples were collected at 3-h intervals. The concentration of blood total NAD (NAD11NADH) in each sample showed no significant differences between the two groups. The urinary excretion amounts of NAD + catabolites in the urine samples collected at 3-6 h after the injection were lower in the β-NMN group than in the Nam group. These results suggest that β-NMN is retained in the body for longer than Nam.

&beta;-Nicotinamide Mononucleotide, an Anti-Aging Candidate Compound, Is Retained in the Body for Longer than Nicotinamide in Rats

β-Nicotinamide Mononucleotide, an Anti-Aging Candidate Compound, Is Retained in the Body for Longer than Nicotinamide in Rats