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| Age | Recommended | Upper limit |
|---|---|---|
| amount | recommended | |
| Birth to 1 year of age | 10 μg (400 IU) | 25 μg (1000 IU) |
| Children (1–12 years) | 15 μg (600 IU) | 60 μg (2400 IU) |
| Adolescents (12–18 years) | 15 μg (600 IU) | 75 μg (3000 IU) |
| Adults (18–17 years) | 15 μg (600 IU) | 100 μg (4000 IU) |
| Elderly (>70 years) | 20 μg (800 IU) | 100 μg (4000 IU) |
