Nicotinic acid and nicotinamide together make up niacin, the NAD+ precursor vitamin; less than 20 mg a day (or dietary tryptophan) meets baseline NAD+ needs.
established — replicated in humans, or settled by a regulator
every claim resolves to its source
All 2 citations resolve to their original source. · 0 posts naming it, 0 members counted once each.
Summary
Nicotinic acid and nicotinamide together make up niacin, the NAD+ precursor vitamin; less than 20 mg a day (or dietary tryptophan) meets baseline NAD+ needs. · pmid:18429699
In a US Veterans Affairs cohort of about 33,800 matched patients, oral nicotinamide 500 mg twice daily was associated with a 14% lower risk of new skin cancers, rising to 54% when started after a first skin cancer. · pmid:40960808
Proportion of the 2 claims about Niacinamide standing at each tier. Community volume is shown on the Consensus tab beside this and is never averaged into it.
Living evidence history
2 resolved citations, oldest to newest, coloured by tier. Retractions and contradictions land here as they are recorded.
Structure
No structure representation on record. PepJunkie draws only what an authoritative record supplies; for a peptide that is the residue sequence, and none has been curated for Niacinamide yet.
Dose evidence, rung by rung
A studied human dose exists on file. Open the rung: the dose is the paper's, in its context, never PepJunkie's.
Approved-label dose· a resolved regulatory document names a labelled dose
nothing resolved on this rung
Studied human doses· resolved human studies at the established tier
Nicotinic acid, nicotinamide, and nicotinamide riboside: a molecular evaluation of NAD+ precursor vitamins in human nutrition. · pmid 18429699 · 2008
Observational evidence· resolved human data at the emerging tier: thin, or contested
Nicotinamide for Skin Cancer Chemoprevention. · pmid 40960808 · 2025
Community-reported protocols· protocol propositions from distinct members, counted once per human
nothing resolved on this rung
Preclinical evidence· resolved animal, cell or mechanistic work
nothing resolved on this rung
2 resolved citations, 0 unresolved (an unresolved citation lends nothing). Community volume is its own rung and is never averaged into the evidence rungs.
Negative findings
failure is information
Nobody has filed a failure yet. Failures are information; this list is waiting for an honest one.