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PubMed Central , StatPearls , StatPearls Publishing, 2026
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
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however, the only statistically significant difference was between the LD control group and both groups switched from WD to LD, regardless of their treatment (Supplementary Fig
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