Hypervitaminose has

The hypervitaminose has or abuse Vitamine has can have the effects according to:

congenital diseases,
anomalies of the Liver,
reduction of the osseous Density being able to lead to the Osteoporosis,
disordered growth of the bones,
capillary losses,
excessive dryness of the skin/Exfoliation.

Symptoms

The symptoms of severe toxicity are nausea and Vomissement, Céphalée, Vertige, disorder of the Vue and loss of muscular coordination.

Causes

The hypervitaminose has occurs when the level limits accumulation by the liver of the Rétinoïde S is reached. Excess is then pulled by blood circulation, which is the cause of systemic toxicity. The vitamin has in the form of β-carotene only is partially converted into rétinoïdes and thus does not cause toxicity.

Although the hypervitaminose has can occur when most of the liver is damaged, the majority of the cases of toxicity of the vitamin have are due to excesses of catch of vitamin has in supplement. The symptoms of intoxication can also be observed in the event of consumption of an significant amount of vitamin has on an amount of time runs.

Tolerance day laborer

The National Institutes off Health American established a tolerance level day laborer to the catch of supplement in vitamin has by a healthy population, in order to prevent the risk of toxicity of vitamin A. These levels limiting in vitamin has by age group, fixed in microgram S (µg) and international Unité (UI) is:

Une possible pregnancy, disease of the liver, important alcohol consumption and smoke den requires a serious control and a limitation with the administration of vitamin A. Cependant, the vitamin has was also tested very often and used thérapeutiquement during several decades in massive amounts from 100.000 to 400.000 UI, for the treatment of the severe Rougeole pediatric in areas or a carrence in vitamin has exists, in order to reduce infant mortality.

See too

Hypervitaminose

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