B vitamins are a group of water-soluble vitamins that has vital roles in cell metabolism, immune and nervous system functions. The B vitamins were once thought to be a single vitamin and referred to as vitamin B. 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. Primary B vitamins includes: B1 (Thiamine), B2 (Riboflavin), B3 (Niacin), B5 (Pantothenic acid), B6 (Pyridoxine), B7 (Biotin), B9 (Folate), and B12 (Cyanocobalamin).
Vitamin B-complex deficiency refers to a deficit in any or more B vitamins.
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