Which disease is caused by a deficiency of niacin (Vitamin B3)?

💡 Solution & Explanation

Pellagra arises directly from a dietary deficiency of niacin or Vitamin B3, manifesting clinically through the classic symptoms of dermatitis, diarrhea, and dementia. Scurvy and beriberi stem from deficiencies of Vitamin C and Vitamin B1 respectively rather than niacin. This deficiency historically affected populations reliant primarily on unfortified maize diets.