![]() The conversion factor for human insulin is: One International Unit (IU) equals 0.0347 mg of insulin. In the same vein, for Vitamin E, o ne International Unit (IU) equals: ![]() ![]() Therefore, they have been standardized with International Units as follows: Essentially, the use of International Units is a way to standardize.įor example, you may see 'Vitamin A' available in a variety of forms in 'over-the-counter' supplements, including:Īlthough they both provide 'Vitamin A', they have different biological activities (i.e., potencies) regarding how much 'Vitamin A' they actually provide. International Units are used over a conventional metric measure (such as milligrams) to make it easier to compare different forms of the same drug. The term 'units' refers to International Units (IU), which is a measure of the "biological activity" of a specific drug or substance. The insulin products you get at the pharmacy will always be labeled in units, or as a concentration in terms of units (e.g., U100 means 100 units of insulin per 1mL of liquid). It's incredibly uncommon to see insulin noted in milligrams (mg).
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