Please use the following table to calculate how many mcg/mg of a vitamin you are getting from your Seeking Health product if the label uses IU (international units) as a unit of measure or vice versa.
| Vitamin | Active Forms | Other forms |
| A | Retinol: 1 IU = 0.3 mcg | Beta-carotene: 1 IU = 0.6 mcg |
| D | Cholecalciferol (vitamin D3): 1 IU = 0.025 mcg | |
| E | d-alpha-tocopherol: 1 IU = 0.67 mg | dl-alpha-tocopherol: 1 IU = 0.9 mg |
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