vitamin B science definition

See thiamine.

See riboflavin.

Any of several water-soluble pyridine derivatives, especially pyridoxine, that are coenzymes in amino acid synthesis and are important in protein and fat metabolism and in healthy nerve function. Vitamin B₆ is found in liver, whole-grain foods, fish, yeast, and many vegetables.

A water-soluble, complex organic compound containing cobalt, found especially in meat, liver, eggs, milk, and milk products. Vitamin B₁₂ is necessary for the synthesis of DNA by the body, for the production of blood cells, and for maintaining the health of nerves. A deficiency of vitamin B₁₂ in the diet results in pernicious anemia. Also called cobalamin, cyanocobalamin.