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Classification and external resources
Specialty endocrinology
ICD-10 E50-E56
ICD-9-CM 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.[1][2]

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


Avitaminoses (and their lacking factors) include:

See also[edit]


  1. ^ Lee Russell McDowell (2000). Vitamins in Animal and Human Nutrition (2 ed.). Wiley-Blackwell. ISBN 0-8138-2630-6. 
  2. ^ Lydia Fehily (1944). "Human-milk intoxication due to B1 avitaminosis" (PDF). British Medical Journal 2 (4374): 509–. doi:10.1136/bmj.2.4374.590. PMC 2286425. PMID 20785731.