Vitamin E in humans: Demand and delivery

被引:371
作者
Traber, MG [1 ]
Sies, H [1 ]
机构
[1] UNIV DUSSELDORF, INST PHYSIOL CHEM 1, D-40001 DUSSELDORF, GERMANY
关键词
tocopherol; lipoproteins; chylomicrons; VLDL; LDL; HDL; tocopherol transfer protein; ataxia with vitamin E deficiency;
D O I
10.1146/annurev.nu.16.070196.001541
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
How much vitamin E is enough? An established use of supplemental vitamin E in humans is in the prevention and therapy of deficiency symptoms. The cause of vitamin E deficiency, characterized by peripheral neuropathy and ataxia, is usually malabsorption-a result of fat malabsorption or genetic abnormalities in lipoprotein metabolism. Genetic abnormalities in the hepatic alpha-tocopherol transfer protein also cause vitamin E deficiency-defects in this protein cause an impairment in plasma vitamin E transport. Impaired delivery of vitamin E to tissues, thereby, results in deficiency symptoms. Also discussed is the use of supplemental vitamin E in chronic diseases such as ischemic heart disease, atherosclerosis, diabetes, cataracts, Parkinson's disease, Alzheimer's disease, and impared immune function, as well as in subjects receiving total parenterol nutrition. In healthy individuals, a daily intake of about 15-30 mg of alpha-tocopherol is recommended to obtain ''optimal plasma alpha-tocopherol concentrations'' (30 mu M or greater).
引用
收藏
页码:321 / 347
页数:27
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