Hypervitaminosis thiamine

Hypervitaminosis A, 25 789 Hypervitaminosis biotin, 25 800 Hypervitaminosis cobalamin, 25 804 Hypervitaminosis D, 25 792 Hypervitaminosis E, 25 794 Hypervitaminosis folic acid, 25 803 Hypervitaminosis K, 25 795 Hypervitaminosis niacin, 25 798 Hypervitaminosis niacinamide, 25 798 Hypervitaminosis pantothenic acid, 25 799 Hypervitaminosis pyridoxine, 25 799 Hypervitaminosis riboflavin, 25 797 Hypervitaminosis thiamine, 25 796 Hyphenated techniques... 

Hypervitaminosis Thiamine. The vitamin is considered very safe. There are no Tolerable Upper Intake Levels. Possibly the rate-limiting phosphorylation step in the intestinal mucosa reduces the risk of toxicity. The percentage of thiamine absorbed decreases as the dose increases. 

A disease resulting from a deficiency of one or more vitamins is hypovitaminosis (if vitamin is supplied in insufficient quantity) or avitaminosis (complete lack of vitamin manifested by some biochemical processes disorder). Deficiency of vitamins was formerly one of the main causes of many diseases and deaths. Pellagra (deficiency of some B-complex vitamins), scurvy (vitamin C), beriberi (thiamine), rickets (vitamin D), pernicious anaemia associated with reduced ability to absorb vitamin Bj2 (corrinoids) and xerophthalmia (vitamin A) are now well-known diseases caused by vitamin deficiency. Excessive intake of one or more vitamins (especially of lipophilic vitamins A and D) also causes an abnormal state resulting from disturbances of biochemical processes and can lead to severe diseases known as hypervitaminosis. 

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