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pellagra US English

A deficiency disease caused by a lack of nicotinic acid or its precursor tryptophan in the diet. It is characterized by dermatitis, diarrhea, and mental disturbance, and is often linked to overdependence on corn as a staple food

pellagra-preventive factor US English

Either of the B-complex vitamins niacin and niacinamide; also called P-P factor.