The human disease caused by the deficiency of vitamin B₃ (niacin) is:

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Pellagra, characterized by dermatitis, diarrhea, dementia (three D's), results from niacin deficiency. Beriberi is due to B₁ deficiency, scurvy to C, rickets to D. Niacin is part of NAD and NADP, essential in redox reactions. Foods rich in niacin include meat, fish, whole grains. Pellagra historically associated with corn-based diets.

The human disease caused by the deficiency of vitamin B₃ (niacin) is: MCQ with Answer and Explanation

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