B Vitamins

B vitamins are a group of water-soluble vitamins that play important roles in cell metabolism. The B vitamins were once thought to be a single vitamin, referred to as vitamin B (much as people refer to vitamin C). Later research showed that they are chemically distinct vitamins that often coexist in the same foods. In general, supplements containing all eight are referred to as a vitamin B complex. Individual B vitamin supplements are referred to by the specific name of each vitamin (e.g., B1, B2, B3 etc.).

Read more about B VitaminsList of B Vitamins, B Vitamin Molecular Functions, B Vitamin Deficiency, B Vitamin Side Effects, B Vitamin Sources, Related Nutrients

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B Vitamins - Related Nutrients
... Many of the following substances have been referred to as vitamins because they were believed to be vitamins at one time ... They are not considered vitamins anymore and the numbers that were assigned to them now form the "gaps" in the true series of B-complex vitamins described above (e.g ... there is no vitamin B4) ...