Vitamin B3 (Nicotinamide riboside) — answers to Niacin, NR
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A form of vitamin B3 and a precursor the body converts into NAD+, a molecule cells use in energy metabolism. It is manufactured for supplement use, distinct from the niacin or nicotinamide forms more commonly found in multivitamins.
Why it’s used
Taken to raise NAD+ levels in the body, with interest in possible downstream effects on aging-related processes and metabolism.
What the evidence is for
raising blood NAD+ levels.
What the evidence says
Human trials consistently show that nicotinamide riboside supplementation raises blood NAD+ levels, which is a well-replicated finding. Whether that increase translates into meaningful health benefits — improved muscle function, metabolic markers, or slowed aging — remains unsettled, with trial results on those downstream outcomes mixed or inconclusive so far.
Dose studied
250–1000 mg — daily doses used in trials measuring NAD+ blood level increases.
Context
Trials measuring NAD+ elevation have used daily doses in the several-hundred-milligram range over periods of a few weeks to several months; longer-term outcome trials are still limited in number.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.