International Units (I.U.) are a measurement used for which group of vitamins?

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Multiple Choice

International Units (I.U.) are a measurement used for which group of vitamins?

Explanation:
International Units express a vitamin’s potency based on its biological activity rather than its weight. This approach is used mainly for fat-soluble vitamins because their activity can vary significantly with different forms and sources, so IU allows meaningful comparison of how much vitamin will have a particular effect. You’ll commonly see IUs on labels for vitamins A, D, E, and K. Water-soluble vitamins, minerals, and proteins are usually measured by weight—micrograms or milligrams for the vitamins, milligrams or grams for minerals, and so on—so they don’t rely on International Units.

International Units express a vitamin’s potency based on its biological activity rather than its weight. This approach is used mainly for fat-soluble vitamins because their activity can vary significantly with different forms and sources, so IU allows meaningful comparison of how much vitamin will have a particular effect. You’ll commonly see IUs on labels for vitamins A, D, E, and K. Water-soluble vitamins, minerals, and proteins are usually measured by weight—micrograms or milligrams for the vitamins, milligrams or grams for minerals, and so on—so they don’t rely on International Units.

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