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Zhang H, Feng CH, He S, Deng MX, Meng H, Chen M
It aids in creating and maturing red blood cells, helps keep nerve cells, and is a component in DNA construction
Diet, supplements (e.g., niacin, NR), and exercise help, but may not suffice post-40 due to inefficiency and depletion.[18][19] Oral precursors like NMN increase NAD+ but bioavailability varies
PNAS 109(18):68686872
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