I’m trying to add a multivitamin (Dagravit Totaal 30) to my recipe, but several vitamins need to be specified in IU rather than the μg given on the package. Apparently the conversion rate depends on which substance is used. Google tells me:
- Vitamin A: 1 IU is the biological equivalent of 0.3 mcg retinol, or of 0.6 mcg beta-carotene. Vitamin D: 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol. Vitamin E: 1 IU is the biological equivalent of 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol.
Seems to make quite a difference for vits A and E, but Dagravit doesn’t give me enough information; just “Vitamin A: 400 μg”, and so forth.
Does anyone know what I should enter into the form? (I guess I could split the difference until I find out the proper conversion rate.)