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 listed in both micrograms (Âµg) and international units (IU). 1 IU of vitamin D is the same as 0.025 Âµg of vitamin D2 or D3. Vitamin D in supplements is usually shown as IU. Table 1 lists the usual dose and the adequate intake (AI) levels for vitamin D for different age groups.