![]() ![]() Vitamin D: 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol.Vitamin C: 1 IU is 50 mcg L-ascorbic acid.Vitamin A: 1 IU is the biological equivalent of 0.3 mcg retinol, or of 0.6 mcg beta-carotene.5Įach IU Vitamin has its specific mass of millimeter which differ from vitamin to another, and to convert from IU to Mg you must know the converting value. Using milligrams changes the value range to 0.015-0.020 mg. In micrograms, that would be 15 to 20 µg. The RDA for an adult range from 600-800 IU. 40 IU of vitamin D equals 1 µg, which can be converted to 0.001 mg. Vitamin D: The most commonly available vitamin D preparation is vitamin D3, or cholecalciferol. The RDA for an adult is 22.4 IU of the natural version and 33.3 IU of the synthetic version, or about 15 mg and 30 mg. In micrograms that is equivalent to 900 µg. The dl-alpha-tocopherol formulation contains 0.9 mg vitamin E per IU. Converted to micrograms it equals 670 µg. One IU of d-alpha-tocopherol equals 0.67 mg. ![]() Vitamin E: Vitamin E is available in two formats: d-alpha-tocopherol, a natural source, and dl-alpha-tocopherol, a synthetic source. Converted to milligrams, this amount equals 0.9 mg. If the RDA for vitamin A as a retinol preparation is 3,000 IU, the equivalent in micrograms is 900 µg. The value for beta carotene is 0.6 µg per IU. The IU equivalent of vitamin A in the retinol format is 0.3 µg per 1 IU. Vitamin A: There are two widely available preparations of vitamin A: retinol and beta carotene. One milligram of Vitamin E = 1.21 to 1.49IU (depending on the carrier).Īnd if their biological equivalent of the same substance may have different IU One milligram of beta carotene = 1667IU of Vitamin A activity.ġ5mg of beta carotene = 25,000IU of Vitamin A activity. Nonetheless, most IUs are quite handy and helpful in use as a means of standardizing measures.Īll international units are officially defined by the International Conference for Unification of Formulae. For example, an IU of vitamin E is the specific biological activity of 0.671 milligrams of d-alpha-tocopherol. The definition of an international unit (IU) is generally arbitrary, technical, and eminently forgettable. This type of measure is used for the fat-soluble vitamins (such as vitamins A, D and E) and certain hormones, enzymes, and biologicals (such as vaccines). IU (international unit): An international unit (IU) is an internationally accepted amount of a substance. Milligram used to measure the mass and concentration of the substance and follow the metric system.īut the international unit measures the biological effect of Vitamins or toxins. For example, 1 IU of Vit A does not equal 1 IU of Vit C.Ĥ- Difference between Milligram and International unit ![]() International unit is different from substance to substance, there are international agreement for each substance. For certain substances, the IU has been identified with a weight of a particular purified form of the material for example, one gram of vitamin A acetate contains 2.904 × 106 IU. International Unit (IU), in pharmacology, quantity of a substance, such as a vitamin, hormone, or toxin, that produces a specified effect when tested according to an internationally accepted biological procedure. A gram is equal to the mass of one milliliter, one thousandth of a liter, of water at 4 degrees C. Milligram: A unit of measurement of mass in the metric system equal to a thousandth of a gram. In this article we will show you the difference between the two units.All drugs must have a specific concentration to identify and control the biological effect, most of these drugs have a concentration unit of milligram (mg) or gram (g), but there are a different class of medications as biological drugs and some of vitamins its concentration is measured by international unit.Drugs that measured by mg and others by IU.Difference between Milligram and International unit.
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