qu'est-ce que c'est? what is that? what is it? what does that mean? Synonyms kÃ©saco; Related terms . qu'est-ce que
Vitamins A, D and E are fat-soluble vitamins measured in international units. An international unit, or IU, is used to measure fat-soluble vitamins. Vitamins A, D and E are measured using international units to calculate recommended intakes, deficiencies and toxicities for healthy people. Recommendations vary based on age and gender.
One IU of vitamin D is the biological equivalent of 25 ng (nanograms) of cholecalciferol or ergocalciferol; therefore 5000 IU of Vitamin D is equivalent to 125 mcg (or 0.125 mg) of either of those compounds.