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维生素E(VE)又名生育酚(tocopherol),是人体必需的脂溶性维生素,多存在于植物组织中,化学结构上属苯骈二氢吡喃的衍生物。VE由α~-,β~-,γ~-和δ~-等生育酚和生育三烯酚(tocotrienols)共8种同系物组成,其中d-α~-生育酚在食物中分布最广且生物活性最高。工业合成的VE含大致相等的8种α~-生育酚的立体异构型,1mg合成型的消旋-α~--醋酸生育酚为1个国际单位(IU),天然型d~-α~-生育酚相当1.49IU的生物效价。菜油和包括大豆、葵花籽、玉米、麦胚芽、坚果等的种子油是生育酚的主要来源,动物
Vitamin E (VE), also known as tocopherol, is a fat-soluble vitamin essential for the body. It is found mostly in plant tissues and is a derivative of phenylhydroxypyran in its chemical structure. VE is composed of eight homologues of tocopherols and tocotrienols such as α ~ -, β ~ -, γ ~ - and δ ~ -, of which d - α - tocopherol is the most widely distributed in food The highest biological activity. The industrial synthetic VE contains approximately the same stereoisomeric forms of eight α-tocopherols, and 1 mg of synthetic racemate-α-tocopheryl acetate is one IU, a natural d -α ~ - Bioavailability of tocopherol equivalent to 1.49 IU. Vegetable oil and seed oils, including soybeans, sunflower seeds, corn, wheat germ, nuts and the like, are the major sources of tocopherol, animal