Vitamin B3 deficiency Pellagra

• Facts:
  Dietary deficiency of niacin
  MC among people on corn-based diets
• History / PE:
  Dermatitis (sun exposed areas), diarrhea, dementia
  Beefy red tongue
  Generalized weakness
  Loss of appetite
• Pneumonic:
  4 D's
  
  D ermatitis
  D iarrhea
  D ementia
  and finally, if untreated, D eath
• See Also:
  Vitamin B deficiency
• Associated With:
  ETOHics
  Long term isoniazid use
  Carcinoid syndrome
  Hartnup disease