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Niacin (Vitamin B3) deficiency
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Summary of Niacin (Vitamin B3) deficiency
Pellagra is a vitamin deficiency disease most frequently caused by a chronic lack of niacin, vitamin B3, in the diet. It can be caused by decreased intake of niacin or tryptophan, and possibly by excessive intake of leucine. The symptoms of pellagra are diarrhea, dermatitis, dementia and possibly death.

Videos

Notes

Biochemistry and nutrition

Nutrition

Carbohydrates, fat and protein
Carbohydrates and sugars
Fats and lipids
Proteins
Nutritional disorders
Vitamin K deficiency
Vitamin D deficiency
Excess Vitamin A
Excess Vitamin D
Folate (Vitamin B9) deficiency
Niacin (Vitamin B3) deficiency
Vitamin B12 deficiency
Vitamin C deficiency
Wernicke-Korsakoff syndrome
Beriberi
Iodine deficiency
Zinc deficiency
Marasmus
Kwashiorkor
Fat-soluble vitamin deficiency and toxicity: Pathology Review
Zinc deficiency and protein-energy malnutrition: Pathology review
Water-soluble vitamin deficiency and toxicity: B1-B7: Pathology review

Assessments
Niacin (Vitamin B3) deficiency

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High Yield Notes
7 pages
Flashcards

Niacin (Vitamin B3) deficiency

7 flashcards
Questions

USMLE® Step 1 style questions USMLE

2 questions

USMLE® Step 2 style questions USMLE

1 questions
Preview

A 17-year-old boy who recently emigrated from Ecuador comes to the office because of neurological and psychiatric disturbances for the past two months. He has been experiencing insomnia, anxiety, moments of disorientation, and occasionally visual hallucinations. He also reports 5-7 watery bowel movements per day which have left him feeling dehydrated. Physical examination shows a symmetrical, hyperpigmented rash on his face, neck and arms. Which of the following is the most likely diagnosis?

External References