What is Pellagra? This is a condition characterized by “The 3 D’s” Diarrhea, Dermatitis and Dementia. The cause is a lack of the vitamin called Niacin (Vitamin B3) and may be seen in heavy corn-eating communities. Pellagra rash is a clinical diagnosis. That is, there are no specific blood/serum studies to diagnose the rash and diarrhea.
Treatment includes nicotinamide 500mg/day.