Vitamin D is a fat-soluble vitamin that is naturally present in very few foods, it is added to other foods through fortification, and is available as a dietary supplement. It is called the sunshine vitamin because it is produced when ultraviolet rays from the sun strike the skin which triggers vitamin D synthesis. Vitamin D is biologically inert and must undergo two transformations in the body for activation. The first occurs in the liver. The second occurs in the kidneys. It helps t...
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