|Also called: niacin a vitamin of the B complex that occurs in milk, liver, yeast, etc. Lack of it in the diet leads to the disease pellagra. Formula: (C5H4N)COOH|
|—n , pl B vitamins|
|any of the vitamins in the vitamin B complex|
nicotinic acid n.
vitamin B n.
Vitamin B complex.
A member of the vitamin B complex, especially thiamine.
vitamin B6 n.
Pyridoxine and related compounds.
vitamin B12 n.
A complex compound containing cobalt, found especially in liver and widely used to treat pernicious anemia. Also called antipernicious anemia factor, cobalamin, cyanocobalamin, extrinsic factor.
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.