Niacin (B3): recommended daily intake
Reference values for niacin (b3) across life-stage groups, from NIH Office of Dietary Supplements: Niacin.
16mg
men
14mg
women
Adults 19–50.
| Life stage | RDA / AI | UL | EAR | AMDR |
|---|---|---|---|---|
| Infants 0–6 months | 2mg (AI) | - | - | - |
| Infants 7–12 months | 4mg (AI) | - | - | - |
| Children 1–3 years | 6mg (RDA) | 10mg | 5mg | - |
| Children 4–8 years | 8mg (RDA) | 15mg | 6mg | - |
| Males 9–13 years | 12mg (RDA) | 20mg | 9mg | - |
| Females 9–13 years | 12mg (RDA) | 20mg | 9mg | - |
| Males 14–18 years | 16mg (RDA) | 30mg | 12mg | - |
| Females 14–18 years | 14mg (RDA) | 30mg | 11mg | - |
| Adult males 19–50 | 16mg (RDA) | 35mg | 12mg | - |
| Adult females 19–50 | 14mg (RDA) | 35mg | 11mg | - |
| Adult males 51+ | 16mg (RDA) | 35mg | 12mg | - |
| Adult females 51+ | 14mg (RDA) | 35mg | 11mg | - |
| Pregnancy (19–30) | 18mg (RDA) | 35mg | 14mg | - |
| Lactation (19–30) | 17mg (RDA) | 35mg | 13mg | - |
Source: NIH Office of Dietary Supplements: Niacin (snapshot 2026-04-30)