Vitamin A is taken in too much and will be poisoned

Vitamin A is taken in too much and will be poisoned
Vitamin essential for human body material, a fixed one supplementary improvement resistance. It is too much for vitamin A to absorb toxicant, infant and pre-school children if one take heavy dose of vitamin A, will take place acute the intersection of vitamin A and too much disease. Among them is mainly poisoned symptom as short-term hydrocephalus and vomiting. Had reported too it has been poisoned that acute vitamin A happened because of eating the liver of polar bear containing abundant vitamin A in a large amount to the explorer of polar region in the past.
In the adult with dermatosis and symptom, take vitamin A20- 30 times recommending supply (RDA) ,Absorb vitamin A, take place chronic the intersection of vitamin A and too much disease in a large amount for a long time on the basis of doctor's order. Symptom of chronic vitamin A is comparatively ordinary for the tired, discomfort, having a liking for sleeping, uncomfortable with the belly sometimes, the bone or joint pains, beating headache seriously occasionally, suffer from insomnia even, irritation uneasy, night sweat night and the intersection of body and mao loss with the nail ing fragily. Constipation takes place sometimes, period abnormality and mood are unstable. The physical examination has skin dry, coarse and becoming scales, the surface of body edema and crackle of corner of the mouth. Even there is exophthalmos sometimes. Chen Ren,etc. once took 10 to every kg weight of experimenter while making curve of able to bearing amount of vitamin A, 000IU, the result has such symptoms as headache happen, have a liking for sleeping and nausea to some people, very similar to above-mentioned symptoms described. Too much symptoms of vitamin A that the infant takes place after taking heavy dose of vitamin A for a long time, the intersection of liver and splenomegaly mainly, red leucocyte reduce and bone marrow grow speed and long bone fragile fracture easy.
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