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What Is an International Unit?

What Is an International Unit? (0:46)

If you've wondered what the term International Unit on vitamin bottles and other supplements means, watch this video. Dr. Robin Miller explains what it is and why it can vary from one type of supplement to another.

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OK here's another question submitted from a viewer. What is an international unit that is used to signify the amount of certain vitamin? That's an excellent question. The official definition according to web-star is, an international unit is a quantity of a biologic such as vitamin that produces a particular biological effect agreed upon is an international standard.

Now is there a way to convert international units to milligrams I'm dying now. No, not really because it depends on potency of the substance, so that milligrams to international units is different for each vitamins. So for instance a thousand units of vitamin D has different milligrams than a thousand units of a thousand units of vitamin A or vitamin E, so u can't really convert it..