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Vitamin E is the next fat soluble vitamin we will discuss.
我们接下来讨论的脂溶性维生素是维生素E
Any ideas on what role vitamin E might have in the body?
有人知道维生素E在人体内的作用吗?
The chemical structures of vitamin E are complicated.
维生素E的化学结构很复杂
There are 8 different forms of vitamin E known
已知的维生素E有8种
however Alpha-Tocopherol is
但α-生育酚
the most active form of vitamin E in humans.
是在人体中最活跃的一种维生素E
The main function for this vitamin is
这种维生素的主要功能是
as an antioxidant in the membranes of the cells.
作为细胞膜的抗氧化剂
All cells of the body are surrounded by
人体的所有细胞外都包裹着
a membrane that contains fat,
一层含有脂肪
cholesterol and various proteins.
胆固醇,和多种蛋白质的膜
Vitamin E interdisperses with the fats in the membrane
维生素E分散在细胞膜的脂肪中
and binds to oxidative agents that attack the fats.
与进攻细胞膜脂肪的氧化基团结合
In this role vitamin E has been found
由于具有抗氧化作用
to have a wide range of benefits to the body including
人们发现维生素E对身体有很多益处
a protective effect on cardiovascular disease and cancer.
包括对于心血管疾病和癌症的预防保护
Antioxidants protect the body from free radicals
抗氧化剂能保护人体,清除自由基
which can damage the cell
这些自由基会破坏细胞
and contribute to the development of
并且加剧
cardiovascular disease and certain types of cancer.
心血管疾病和某些肿瘤的生长
However research to study the role of
然而补充维生素E
supplementing vitamin E to prevent heart disease
对于预防心脏疾病
or cancer have not been very successful.
或癌症的研究并没有获很大进展
Vitamin E is a scavenger of oxidation agents in the body
维生素E可以说是人体内氧化性物质的清除专家
collecting the free radicals
它会收集自由基
and providing a defense against tissue damage.
为人体组织提供一道有效的保护屏障
Therefore having an adequate supply
所以摄入足量的
of vitamin E is important.
维生素E十分重要
However taking large amounts of supplements
然而服用大量补品
do not seem to be of much value.
似乎不那么有用
Vitamin E has also been shown to aid
还显示维生素E有助于
in the healing of wounds
伤口愈合
because of its role in cell proliferation
这都是因为它在细胞增殖
and free radical protection.
及自由基保护中的作用
Here are the recommended intakes of vitamin E.
这里是推荐的维生素E摄入量
Again we see the use of IUs
我们再一次用到国际单位
because of the many chemical forms of vitamin E.
因为维生素E有多种化学形式
You may also see vitamin E expressed as TE
你们也可能看到维生素E被称为TE
or tocopherol equivalents.
或者生育酚等价物
This refers to the chemical name of vitamin E,
这是指维生素E的化学名称
tocopherol and the most active form alpha-tocopherol.
生育酚及其最具活性的形态α-生育酚
Men and women over the age of 14
14岁以上的男性和女性每天
should consume approximate 22.5 IUs
应摄入22.5国际单位
or 15 milligrams per day.
或15毫克
During pregnancy the recommendation
怀孕期间推荐的摄入量
stays the same however during lactation
与此相同,但哺乳期间
the recommendation increases to 28.5 IUs
推荐的日摄入量增加到每天28.5国际单位
or 19 milligrams per day.
或19毫克
Vegetable oils, nuts, green leafy vegetables
植物油,坚果,绿叶菜
and fortified cereals are common sources of vitamin E.
及强化谷物是维生素E的常见食物来源
There has never been any known deficiency of vitamin E
至今还没有人类缺乏维生素E
with defined symptoms in the human, presumably
的典型症状
because vitamin E is so widely available in foods.
可能是因为维生素E是如此广泛存在于食物中
Leafy green vegetables are
绿叶菜也是
also good sources of vitamin E as well as grains
补充维生素E很好的食物来源
such as fortified cereals and wheat germ.
像强化谷物和麦芽这样的谷类也是
Avocados, peanut butter and tomato sauce
鳄梨,花生酱,及番茄酱
are also good sources of vitamin E.
也是补充维生素E很好的选择
