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Commonly available forms of active and nutritional vitamin D
| Nutritional Forms of Vitamin D | Active Forms of Vitamin D |
|---|---|
| Ergocalciferol (D2) | Calcitriol (D3) |
| Cholecalciferol (D3) | Paricalcitol (D2) |
| Doxercalciferol (D2) | |
| Maxacalcitol (D3) | |
| 1-alfa-calcidiol (D3) | |
| 22-oxacalcitriol (D3) |
D2 or D3 designate underlying structure. D2 is commonly made in plants, whereas D3 is made in animals.
