The National Academy of Medicine (NAM) publishes guidelines for daily vitamin D intake in the form of recommended dietary allowances (RDA) or adequate intakes (AI). The RDA is the average daily intake sufficient to meet the nutrient requirements of nearly all (97%–98%) healthy individuals (Table 2).
Table 2. Recommended Daily Intake of Vitamin D.| 1 to 18 years old | 19 to 70 years old | 71+ years old |
|---|
| 600 IU/day | 600 IU/day | 800 IU/day |
