Answer by
ladyhaly (40)
Niacin deficiency is caused by deficient or inadequate intake or absorption or niacin (nicotinic acid) or its amide (niacinamide, nicotinamide). It is commonly associated with restricted or limited diets in which single cereal grain, especially corn, is consumed without adequate consumption of wheat, eggs, beef, poulty, or other niacin- or tryptophan-rich foods. Condition also found in chronic alcoholism.