Avitaminosis

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Avitaminosis Classification and external resources
ICD-10	E50-E56
ICD-9	264-269
MeSH	D001361

Avitaminosis is any disease caused by chronic or long-term vitamin deficiency or caused by a defect in metabolic conversion, such as tryptophan to niacin. They are designated by the same letter as the vitamin.

Conversely hypervitaminosis is the syndrome of symptoms caused by over-retention of fat-soluble vitamins in the body.

[edit] Types

Avitaminoses include

• vitamin A deficiency causes xerophthalmia or night blindness
• thiamine deficiency causes beriberi
• niacin deficiency causes pellagra
• vitamin B12 deficiency leads to megaloblastic anemia
• vitamin C deficiency leads to scurvy
• vitamin D deficiency causes rickets
• vitamin K deficiency causes bleeding

[edit] See also

• Essential nutrient
• Illnesses related to poor nutrition
• Vitamin#Human vitamins for more details.
• Orthomolecular medicine

v • d • e Nutrition disorders (E40-68, 260-269) Malnutrition Kwashiorkor - Marasmus - Catabolysis Avitaminosis B vitamins: B1: Beriberi/Wernicke's encephalopathy, B2: Ariboflavinosis, B3: Pellagra, B6: Pyridoxine deficiency, B7: Biotin deficiency, B9: Folate deficiency, B12: Vitamin B12 deficiency other vitamins: A: Vitamin A deficiency/Bitot's spots, C: Scurvy, D: Rickets/Osteomalacia Mineral deficiency Zinc deficiency - Iron deficiency - Magnesium deficiency - Chromium deficiency Hyperalimentation Obesity - Vitamin poisoning (Hypervitaminosis A, Hypervitaminosis D, Hypervitaminosis E)