Niacin (Vitamin B3) deficiency
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Niacin (Vitamin B3) deficiency
Nutrition
Carbohydrates, fat and protein
Nutritional disorders
Excess Vitamin A
Excess Vitamin D
Vitamin D deficiency
Vitamin K deficiency
Kwashiorkor
Marasmus
Iodine deficiency
Zinc deficiency
Beriberi
Folate (Vitamin B9) deficiency
Niacin (Vitamin B3) deficiency
Vitamin B12 deficiency
Vitamin C deficiency
Wernicke-Korsakoff syndrome
Fat-soluble vitamin deficiency and toxicity: Pathology review
Water-soluble vitamin deficiency and toxicity: B1-B7: Pathology review
Water-soluble vitamin deficiency and toxicity: B9, B12 and vitamin C: Pathology review
Zinc deficiency and protein-energy malnutrition: Pathology review
Summary
Niacin or vitamin B3 is important for the proper functioning of the nervous system and the metabolism of carbohydrates, fats, and proteins.
Deficiency in niacin presents with weakness, fatigue, loss of appetite, and skin problems such as rashes or hyperpigmentation. Severe niacin deficiency can lead to a condition called pellagra, which is characterized by diarrhea, dermatitis, dementia, and death.
Niacin deficiency is commonly caused by inadequate intake of niacin or tryptophan, an amino acid that the body can convert into niacin. The treatment is usually increasing the intake of niacin through diet or supplements.