视频文本
The educated materials presented here
这里展示的教学材料
were developed by students and faculty
由爱荷华州立大学
of the Department of Food Science and Human Nutrition
食品科学及人类营养学系
at Iowa State University.
的学生和老师完成
Funding for this project was provided by
此项目由
grants from the American Cancer Society
美国癌症协会-
Midwest and the Lance Armstrong Foundation.
中西部和兰斯阿姆斯特朗基金会赞助支持
The materials are intended for educational use
此材料仅作教学使用
and are not meant to provide medical advice.
而非医疗咨询
We welcome your feedback about these materials.
我们欢迎你对于这些材料给予反馈
Please use the evaluation survey link on the homepage
请通过主页上的评估调查链接
to provide your comments and suggestions.
提供你的评价和建议
In this presentation we will outline basic information
这堂课我们将介绍
about the vitamins that are carried in foods with fat,
与食物中的脂肪共存的维生素
the so-called fat soluble vitamins.
即脂溶性维生素
There are four vitamins in this category:
这类维生素有四种
vitamin D, vitamin E, vitamin K and vitamin A.
维生素D 维生素E 维生素K 维生素A
An easy way to remember them is
一个记住它们的简单方法是
by using the acronym DEKA
用首字母缩略词DEKA
Many of you may be asking:
你们中的很多人也许会问
what are fat soluble vitamins?
什么是脂溶性维生素?
Fat soluble vitamins include
脂溶性维生素包括
the vitamins A, K, E and D.
维生素A K E D
And the reason they are called fat soluble is
它们之所以叫脂溶性维生素
because they are associated with fats,
是因为它们与脂肪有关
that are carried with fats when absorbed into the body.
它们被吸收进身体时和脂肪在一起
In certain diseases such as Crones disease
在某些疾病里,如?
or cystic fibrosis dietary fat is not well absorbed
或囊胞性纤维症,膳食脂肪不能很好的吸收
which can cause the malabsorption of these vitamins.
会导致这些维生素的吸收不良
Fat soluble vitamins are only needed
保持健康只需要
in small amounts to sustain good health.
很少量的脂溶性维生素
Because our bodies store excess fat soluble vitamins
由于在我们的身体里肝脏和脂肪细胞贮存着
in the liver and in fat cells we don't need
过量的脂溶性维生素,我们不必
to consume them everyday to avoid deficiencies.
每天摄入来避免缺失
However because they are retained in the body
但因为它们被贮存在体内
there are high risks of toxicity
如果吸收太多某种脂溶性维生素
if too much of a fat soluble vitamin is ingested.
就有很高的中毒危险
For this reason an upper tolerable limit
为此每种脂溶性维生素
has been defined for each fat soluble vitamin.
都有其摄入的上限
The upper tolerable limit is the amount
该上限被认为是
which is considered to be safe
安全的摄入量
and to be without any adverse side effects.
并且不会产生有害的副作用
From these pictures can you guess
在这些图片里你能猜到
what some important functions of vitamin A are?
维生素A的一些重要功能吗?
Vitamin A is important for eye function, skin health,
维生素A对于视觉功能,皮肤健康很重要
and may have a role in cancer prevention.
也可能有助于预防癌症
Vitamin A has many roles in the body.
维生素A在身体内发挥着许多作用
Vision was the first role identified for vitamin A.
首先发现视觉与维生素A相关
Vitamin A deficiency remains
缺乏维生素A仍是
the most common cause of blindness in the world today.
当今世界上导致失明的最常见原因
In the form of retinol it produces the pigments
它以视黄醇的形式形成了
in the retina of the eye that respond to light.
眼睛视网膜的感光色素
Early signs of vitamin A deficiency include
早期维生素A缺乏的征兆包括
night blindness because of the lack of adequate retinol.
夜盲,这是因为缺少足够的视黄醇
When treated night blindness is reversible
经过治疗,夜盲症可以康复
however if the vitamin A deficiency is not corrected
但如果维生素A缺乏症没有得到治疗
permanent loss of vision can occur.
可能会造成永久性失明
Vitamin A also has other roles in the body
维生素A在身体内还发挥着其他作用
including promoting teeth and bone development
包括促进牙齿和骨骼生长
and as a regulator of cell division and differentiation.
以及调整细胞分裂分化

视频及简介

视频简介：

本课程的目标是，向公众提供最新的有关营养方面的信息和话题，内容涵盖饮食因素对于癌症的影响作用，健康的饮食习惯，学校能提供的营养有哪些，咖啡因与癌症的联系，水果蔬菜与癌症预防等。通过本课程的学习，人们可以学习到健康的生活饮食习惯，在每天的饮食中防癌症于未然