- For U.S. residents
| Age (y) | RDA (μg/day) |
| Infants | |
| 0.0-0.5 | 5 |
| 0.5-1.0 | 10 |
| Children | |
| 1-3 | 15 |
| 4-6 | 20 |
| 7-10 | 30 |
| Males | |
| 11-14 | 45 |
| 15-18 | 65 |
| 19-24 | 70 |
| 25-50 | 80 |
| 51+ | 80 |
| Females | |
| 11-14 | 45 |
| 15-18 | 55 |
| 19-24 | 60 |
| 25-50 | 65 |
| 51+ | 65 |
| Pregnancy | 65 |
| Lactating | |
| 1st 6 months | 65 |
| 2nd 6 months | 65 |