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. Avitaminoses include

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

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

See also

• Vitamin#Human vitamins for more details.

External links

• OMNI

Nutrition

Авитаминоза | Avitaminose | Avitaminozo | Avitaminose | Awitaminoza | Avitaminose | Avitaminoza