Question: is iu same as units?
Answer: An IU (International Unit) is a unit of measurement for vitamins and other specific biologically active substances. ... 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol. Vitamin E: 1 IU is the biological equivalent of 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol.