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.
Vitamin D is measured in international units (IU). The Institute of Medicine recommends getting this much vitamin D every day: 1  Adults ages 19-70: 600 IU daily. 2  Adults older than 70: 800 IU daily.