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打印
These large data sets allowed for
這些大規模的數據
a high level of statistical power to determine
在統計學上反映出了
correlations among dietary factors in disease occurrence.
飲食因素和疾病發生之間的關聯，具有很高的說服力
The conclusion of the work was that
結論指出
consumption of caffeinated coffee, tea or caffeine
攝入含咖啡因的咖啡，茶
or caffeine intake alone had no effect
甚至咖啡因本身，都不會對
on risk of either colon or rectal cancers
患結腸癌或直腸癌的幾率產生任何影響
in either men or women.
無論是對男性還是女性來說
Of interest the researchers did find that
有趣的是研究者確實發現
consumption of two or more cups of decaffeinated coffee
每天飲用兩杯或以上脫咖啡因的咖啡
per day significantly reduced the risk of rectal cancers.
會顯著降低了直腸癌的患病幾率
As with all human studies it is not possible to determine
所有人的研究都很難指出
what specific components of coffee
咖啡中究竟是什么成分
may be responsible for these effects.
才能產生這些效應
Many lifestyle factors impact risk of cancer
很多生活方式的因素會影響得癌癥的幾率
and although the research factors these
盡管這個研究
into their statistical analysis
在統計分析考慮到了這些
it is not fully possible to
但是不太可能完全
eliminate the impact of these factors.
消除它們的影響
Now let's take a look at caffeine's role
現在讓我們看看咖啡因
in tea, coffee and cancer.
在茶，咖啡，和癌癥中的作用
How much caffeine do you consume daily?
你每天攝入多大量的咖啡因?
And why do you drink caffeinated drinks?
你為什么喝含有咖啡因的飲品?
Caffeine is found in several beverages and foods.
咖啡因存在于好幾種飲品和食物中
This chart compares the amounts of caffeine
這個表對咖啡和茶中的咖啡因含量
found in coffee and tea.
進行了比較
As you can see coffee is
你們可以看到咖啡中的
significantly higher in caffeine content than tea.
咖啡因含量比茶里的高很多
The way coffee is prepared also
咖啡的制作方法
affects the amount of caffeine in the beverage.
也會影響其咖啡因的含量
Black, white and green teas
紅茶，白茶，和綠茶的
also contain measurable amounts of caffeine.
咖啡因含量也很可觀
This may be surprising to some people
一些認為綠茶不含咖啡因的人
who may think that green tea is caffeine free.
也許會感到很驚訝
Decaffeinated teas have very low amounts of caffeine
脫咖啡因的茶含有很少量的咖啡因
and are a good alternative
它是個不錯的選擇
if you are interested in limiting caffeine intake.
如果你想控制咖啡因的攝入
The caffeine content in brewed coffee
煮制的咖啡里所含咖啡因的量
averages between 100 and 200 mg per cup.
為平均每杯100到200毫克
While the amount in regular tea
而普通茶中的含量
ranges from about 40 to 100 mg.
約為每杯40到100毫克
This chart lists a variety of beverages,
這張圖標列出了多種飲料
foods and medicines with their caffeine content.
食品和藥品及它們的咖啡因含量
Note that caffeine content is not required
要注意的是咖啡因含量并不要求
to be included on the food label.
在食品標簽上標出
So finding the amount of caffeine in a product
所以要想知道一種產品的咖啡因含量
may take some investigation.
可能要做一些調查
There are several websites
有幾家網站上
where this information can be found
能找到有這方面信息
including those of the manufacturer of the product
它們包括該產品制造商的網站
and also at the Mayo Clinic nutrition website.
以及梅奧診所的營養網站
Where does your favorite beverage compare?
你最喜歡的飲品有什么好處?
Are you surprised by where it falls
你會因其
in comparison to other products?
劣于其他產品而驚訝嗎?
Something that may be surprising is
也許令人驚訝的是
the amount of caffeine in two tablets of
兩片強效伊克賽錠所含的咖啡因
extra strength Excedrin is 130 milligrams.
有130毫克
This is about the amount provided
這相當于將一杯咖啡中的咖啡因
in a cup of coffee and is delivered in two pills.
轉移到了兩個藥片里
Now that you have an idea of
既然你們已經了解了
how much caffeine is in some popular beverages
一些流行飲品中咖啡因含量
let's take a look at how caffeine affects the body.
讓我們來看看咖啡因是如何影響身體的
