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.
Plateau relation of intestinal calcium absorption fraction (for an ingested calcium load of â300 mg) to vitamin D status, expressed as serum 25-hydroxyvitamin D [25(OH)D]. Arrows above and below the plateau level represent physiologic regulation unlimited by vitamin D status.