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.
The safe upper limit for vitamin D is 1,000 to 1,500 international units (IU) per day for infants. For children aged one to eight years, the safe upper limit is 2,500 to 3,000 IU/day, and 4,000 IU/day for children nine years and older, adults and pregnant and lactating teens and women.