Dermatitis, diarrhea, and dementia form a triad typical of a deficiency of which vitamin?
A. vitamin A
B. B1 (thiamine)
C. B12 (cobalamin)
D. niacin
E. vitamin C
D
Deficiency of niacin results in pellagra, which is characterized by skin changes (dermatitis), diarrhea, and mental changes (dementia)—symptoms memorized as the three Ds of pellagra.
Health & Biomechanics
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