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You will in general be restricted in intake sources containing Vitamin B12
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
It is critical to share your complete medical history with your healthcare provider to ensure safe use
Individual variation in requirements and absorption means no single protocol fits everyone
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