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Fat-soluble vitamins — A, E, D, ... Kathleen Finlay/Getty Images 2021-05-27T16:37:23Z ... Vitamin E is an antioxidant critical in protecting the body from free radicals.
That fat-soluble substance became known as vitamin A. Clockwise from right: Casimir Funk identified the first vitamin, later called B. Carl Peter Henrik Dam found K, and Elmer McCollum discovered A.
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