What is the recommended daily niacin intake for adults?
For adults, the recommended daily intake of niacin is given in niacin equivalents (NE) (because niacin can come from both preformed niacin and the amino acid tryptophan).
Typical guidance ranges from about 14 to 16 mg NE per day for most adults:
- Men (19+ years): 16 mg NE/day
- Women (19+ years): 14 mg NE/day
(You may also see lower targets listed for younger adults; the exact number depends on age group and whether the guidance is by men vs. women.)
How much niacin is that in “mg of niacin” vs supplements?
Dietary guidance uses NE to account for:
- Preformed niacin (nicotinic acid or nicotinamide), and
- Tryptophan, which the body can convert to niacin.
Supplement labels are often listed as mg of niacin, so the amount on the bottle may not match the exact NE concept used in dietary recommendations.
What are safe upper limits for niacin?
Niacin from supplements or medications (especially “niacin” used to affect cholesterol) can reach doses far above dietary needs. Dietary niacin from food is not usually the issue; the upper-limit concern is mostly about supplemental nicotinic acid.
If you’re taking niacin for cholesterol or another medical reason, it’s important to follow clinician guidance because high doses can raise the risk of side effects.
Does the intake differ for pregnancy or breastfeeding?
Yes. Recommendations are higher for pregnancy and breastfeeding compared with non-pregnant adults. If you tell me whether you mean pregnancy/breastfeeding, I can give the matching target.
Daily intake for adults: quick check
If you just need the basic adult targets (non-pregnant):
- Men: 16 mg NE/day
- Women: 14 mg NE/day
Sources
I can provide the exact adult figures with citation, but I need one detail: do you want the recommendation under US (Institute of Medicine/NAM), EU (EFSA), or another guideline?