| Fortified sources |
| Cereal | 100 IU per serving |
| Milk | 100 IU per 8 oz |
| Orange juice | 100 IU per 8 oz |
| Nonfortified food sources |
| Breast milk† | 20 IU per L |
| Cod liver oil | 400 IU per teaspoon |
| Egg yolk | 20 IU |
| Mackerel (canned) | 250 IU per 3.5 oz |
| Salmon (canned) | 300 to 600 IU per 3.5 oz |
| Salmon (fresh, farmed) | 100 to 250 IU per 3.5 oz |
| Salmon (fresh, wild) | 600 to 1,000 IU per 3.5 oz |
| Sardines (canned) | 300 IU per 3.5 oz |
| Tuna (canned) | 230 IU per 3.6 oz |
| Prescription supplements |
| Vitamin D2 (ergocalciferol) | 50,000 IU per capsule |
| Vitamin D2 (ergocalciferol [Drisdol]) liquid supplements | 8,000 IU per mL |
| 1,25-dihydroxyvitamin D (calcitriol [Rocaltrol]) | 0.25 or 0.5 mcg per capsule |
| 1,25-dihydroxyvitamin D (calcitriol [Calcijex]) | 1 mcg per mL solution for injection |
| Over-the-counter supplements |
| Vitamin D3or cholecalciferol | 400, 800, 1,000, or 2,000 IU per tablet |