vitamin B complex

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vitamin B complex An old‐fashioned term for the various B vitamins: vitamin B1 (thiamin), vitamin B2 (riboflavin), niacin, vitamin B6, vitamin B12, folate, biotin, and pantothenic acid. These vitamins occur together in cereal germ, liver, and yeast; function as coenzymes; and historically were discovered by separation from what was known originally as vitamin B; hence, they are grouped together as the B complex.

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