As we celebrate the 235th birthday of our great nation, we asked a number of community leaders to share their thoughts on what the Fourth of July means to them. The Fourth of July reminds me very simply of our freedom.
Vitamin A: 1 IU is the biological equivalent of 0.3 mcg retinol, or of 0.6 mcg beta-carotene. 1  Vitamin D: 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol. 2  Vitamin E: 1 IU is the biological equivalent of 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol.
International Units (IU) are an old terminology used to state the potency of vitamins A, D and E before vitamins were manufactured in a pure enough form to be measured by weight. One IU of Vitamin A = 0.3 micrograms. One IU of Vitamin D = 0.025 micrograms. One IU of Vitamin E = 0.67 milligrams.