Vitamin B12: recommended daily intake
Reference values for vitamin b12 across life-stage groups, from NIH Office of Dietary Supplements: Vitamin B12.
2.4 µg/day
Adults 19–50.
| Life stage | RDA / AI | UL | EAR | AMDR |
|---|---|---|---|---|
| Infants 0–6 months | 0.4µg (AI) | - | - | - |
| Infants 7–12 months | 0.5µg (AI) | - | - | - |
| Children 1–3 years | 0.9µg (RDA) | - | 0.7µg | - |
| Children 4–8 years | 1.2µg (RDA) | - | 1µg | - |
| Males 9–13 years | 1.8µg (RDA) | - | 1.5µg | - |
| Females 9–13 years | 1.8µg (RDA) | - | 1.5µg | - |
| Males 14–18 years | 2.4µg (RDA) | - | 2µg | - |
| Females 14–18 years | 2.4µg (RDA) | - | 2µg | - |
| Adult males 19–50 | 2.4µg (RDA) | - | 2µg | - |
| Adult females 19–50 | 2.4µg (RDA) | - | 2µg | - |
| Adult males 51+ | 2.4µg (RDA) | - | 2µg | - |
| Adult females 51+ | 2.4µg (RDA) | - | 2µg | - |
| Pregnancy (19–30) | 2.6µg (RDA) | - | 2.2µg | - |
| Lactation (19–30) | 2.8µg (RDA) | - | 2.4µg | - |
Notes
- No Tolerable Upper Intake Level (UL) has been established for vitamin B12.
Source: NIH Office of Dietary Supplements: Vitamin B12 (snapshot 2026-04-30)