视频文本
The education materials presented here
本片呈现的教育材料
were developed by students and faculty
是由爱荷华州立大学食物科学
of the Department of Food Science
和人类营养学学院的
and Human Nutrition at Iowa State University.
学生和教员总结完成的
Funding for this project was provided by grants
本项目由中西部美国癌症协会
from the American Cancer Society Midwest
和兰斯·阿姆斯壮基金会
and the Lance Armstrong Foundation.
出资赞助
The materials are intended for educational use
本材料用于教育
and are not meant to provide medical advice.
而非提供医疗指导
We welcome your feedback about these materials.
我们欢迎您对本材料做出反馈
Please use the evaluation survey link on the homepage
请登录首页，点击评估调查链接
to provide your comments and suggestions.
提供您的评论和建议
This presentation will cover information
本课程内容包括
about vitamin D and calcium and the role
维生素D和钙的相关信息
these nutrients play in cancer prevention.
以及这两种营养物质对癌症防治的作用
Vitamin D is a fat soluble vitamin.
维生素D是一种脂溶性维生素
This means that it can only be absorbed with fat.
这意味着它只能被脂肪所吸收
Vitamin D is not found in many foods.
很多食物没有维生素D的成分
In fact it can be difficult to obtain
事实上从食物中很难摄取到足够数量的
required amounts of vitamin D from foods.
满足人体需求的维生素D
Foods that naturally contain significant
富含维生素D的食物
amounts of vitamin D are fatty fish and eggs.
有多脂鱼和蛋类
To increase intake of vitamin D
为了增加维生素D的摄取
foods have been fortified.
食物中的维生素D量已经得到强化
Milk is the most commonly consumed product
牛奶是人们最常购买的
that is fortified with vitamin D.
强化维生素D的食品
Juices, breakfast cereals, breads and yogurt
蔬果汁，早餐谷物食品，面包和酸奶
are also fortified with vitamin D.
也都是维生素D强化食品
Dietary supplements are also consumed
很多个人购买膳食补充剂
by many individuals to meet
来满足日常所需
the daily requirements of vitamin D.
的维生素D
There are many forms of supplements
还有很多补充维生素D的方法
and I will discuss these later.
稍后我会讲到
Cholecalciferol is a form of vitamin D
维生素D3是维生素D的一种形式
made naturally by the body
是皮肤裸露在太阳光下时
when the skin is exposed to sunlight,
人体自然形成的一种物质
however most people do not get
然而，大多数人
enough sunlight to satisfy their daily
并没有获得足够的阳光
recommended intake through sunlight
来满足每日推荐摄入量
especially in the winter.
尤其是在冬天
Recommended daily intakes are given
每日推荐摄入量的多少
in international units which is abbreviated IU.
通过国际单位来表示
One IU is equal to 40 micrograms.
缩写为IU,一个IU等同于40毫克
The recommendations are 200 IU
从出生到50岁
from birth to 50 years of age,
推荐摄入量为200IU
400 IUs from 51 to 70 years of age
从51岁到70岁为400IU
and 600 IUs for 71 plus years of age.
71岁以后为600IU
These recommendations meet the minimum
推荐摄入量满足了最小需求
requirements mostly based on bone health.
以保持骨骼健康为基础
Currently there's debate within the medical community
当前，医学界
about the daily recommended intake for vitamin D.
对维生素D的日常推荐摄入量存在争议
The debate is about whether or not
争议围绕的问题是
the current amounts are adequate for all of
当前的的日常推荐摄入量
the functions vitamin D plays in the body.
是否能够满足人体的所有功能的需求
Current research suggests consuming amounts
目前的研究表明
closer to 1000 IU may be needed to obtain
人体需要吸收将近1000IU的维生素D
all the potential benefits of vitamin D.
才能得到维生素D的所有潜在益处
Some examples of vitamin D content
下面列举一些含有
in foods are shown here.
维生素D成分的食物
Fish including salmon and tuna are excellent sources.
鲑鱼和金枪鱼是很好的维生素D来源
Egg also contains vitamin D.
鸡蛋也含有维生素D
The highest concentration is in the yolk.
酸奶中的维生素D最为丰富
Other good food sources include 3 oz of beef liver
另外 3盎司的牛肝含有42IU的维生素D
which contains 42 IU and 3 oz of pork spare ribs
3盎司的猪排骨包含88IU
which contain 88 IU. Some foods that are fortified
下面是一些
with vitamin D are shown here.
维生素D强化食物
An 8 oz glass of milk will contain 115 IU
8盎司牛奶包含115IU
and 8 oz of fortified orange juice
8盎司强化橙汁
contains 100 IU of vitamin D.
含有100IU维生素D
Cheerios are a good source as are other
如同其他强化的早餐谷物食品一样
fortified breakfast cereals.
麦片也是一种很好的维生素D来源
Yogurt is another diary product that
酸奶是另一种
also provides vitamin D.
提供维生素D的奶制品

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