n. a group of water-soluble vitamins originally thought to be a single vitamin but now separated into several B vitamins.
n. a B vitamin
n. a B vitamin that is used to treat pernicious anemia.
n. a B vitamin that prevents skin lesions and weight loss.
n. See nicotinamide.
n. See nicotinic acid.
n. a B vitamin that is essential for metabolism of amino acids and starch.
n. a B vitamin that is essential for cell growth and reproduction. Also called
n. a mixture of water-soluble vitamins originally thought to be a single vitamin but now known to be a mixture of several compounds with vitaminic activity.