Definition of Niacin
Niacin: Nicotinic acid, one of the B-complex vitamins-B 3. Deficiency of niacin in the diet results in the disease pellagra. See: Pellagra.
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Niacin: Nicotinic acid, one of the B-complex vitamins-B 3. Deficiency of niacin in the diet results in the disease pellagra. See: Pellagra.