structural:expansion, stylistic:style_transfer, quality:correction, information:extraction, information:classification
B vitamins

B vitamins, also known as the B-complex, are an interrelated group of nutrients which often co-occur in food. The complex consists of: thiamine (B), riboflavin (B), niacin (B), pantothenic acid (B), pyridoxin (B), folic acid (B), cobalamin (B), and biotin. B vitamins are not synthesized in the body, and thus need to be obtained from food. B-complex vitamins are water-soluble vitamins, which means that they are not stored within the body. In consequence, the B vitamins need ongoing replenishment. It is possible to identify broad cognitive effects of certain B vitamins, as they are involved in many significant metabolic processes within the brain.