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咖啡是健康饮料吗[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ yHL#M:JIKl ~- r9a$FroG]
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咖啡通常都不被看作一种健康饮料，但是近来一些研究表明咖啡可能是一种十分有益的饮料。研究人员已经在找到可靠的证据证实，咖啡可以降低许多严重疾病的患病风险，其中包括了糖尿病、心脏病和肝硬化。[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ (w{r~$ a[40xbxnFroG]
Coffee is not usually thought of as health food, but a number of recent studies suggest that it can be a highly beneficial drink. Researchers have found strong evidence that coffee reduces the risk of several serious ailments, including diabetes, heart disease and cirrhosis of the liver.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 8OJQ%de]"/4IoU6 FroG]
Among them is a systematic review of studies published last year in The Journal of the American Medical Association, which concluded that habitual coffee consumption was consistently associated with a lower risk of Type 2 diabetes. Exactly why is not known, but the authors offered several explanations.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ ttk]Vw7e}$LnRE'TFroG]
Coffee contains antioxidants that help control the cell damage that can contribute to the development of the disease. It is also a source of chlorogenic acid, which has been shown in animal experiments to reduce glucose concentrations.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ v]`ie8() v{*o?,FroG]
Caffeine, perhaps coffee's most famous component, seems to have little to do with it; studies that looked at decaffeinated coffee alone found the same degree of risk reduction.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 'f5^wkf-d(|zhn0dp FroG]
Larger quantities of coffee seem to be especially helpful in diabetes prevention. In a report that combined statistical data from many studies, researchers found that people who drank four to six cups of coffee a day had a 28 percent reduced risk compared with people who drank two or fewer. Those who drank more than six had a 35 percent risk reduction.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ R'R Zr _116^m(X_FroG]
Some studies show that cardiovascular risk also decreases with coffee consumption. Using data on more than 27,000 women ages 55 to[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ \$&M'&1yRL i?' FroG]
But as the quantity increased, the benefit decreased. At more than six cups a day, the risk was not significantly reduced. Still, after controlling for age, smoking and alcohol consumption, women who drank one to five cups a day - caffeinated or decaffeinated - reduced their risk of death from all causes during the study by 15 to 19 percent compared with those who drank none.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 0)2sw ia |;h5 .T=,FroG]
The findings, which appeared in May in The American Journal of Clinical Nutrition, suggest that antioxidants in coffee may dampen inflammation, reducing the risk of disorders related to it, like cardiovascular disease. Several compounds in coffee may contribute to its antioxidant capacity, including phenols, volatile aroma compounds and oxazoles that are efficiently absorbed.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 9}tGB n I3Mm!aDFroG]
In another analysis, published in July in the same journal, researchers found that a typical serving of coffee contains more antioxidants than typical servings of grape juice, blueberries, raspberries and oranges.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ r(]UjvFt/eb LzN9FroG]
"We were surprised to learn that coffee quantitatively is the major contributor of antioxidants in the diet both in[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ *X a+%l31H.1dXXFroG]
These same anti-inflammatory properties may explain why coffee appears to decrease the risk of alcohol-related cirrhosis and liver cancer. This effect was first observed in 1992. Recent studies, published in June in The Archives of Internal Medicine, confirmed the finding.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ !hA^i !nGf%(w=,M�FroG]
Still, some experts believe that coffee drinking, and particularly caffeine consumption, can have negative health consequences. A study published in January in The Journal of the[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ 9 v=oc:qsGCYkFroG]
Rob van Dam, a Harvard scientist and the lead author of The Journal of the American Medical Association review, acknowledged that caffeine could increase blood pressure and slightly increase levels of the amino acid homocysteine, possibly raising the risk for heart disease.[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ V;-*)�|]6Law/4V2JFroG]
"I wouldn't advise people to increase their consumption of coffee in order to lower their risk of disease," Dr. van Dam said, "but the evidence is that for most people without specific conditions, coffee is not detrimental to health. If people enjoy drinking it, it's comforting to know that they don't have to be afraid of negative health effects."[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ !z0qb"bd*2gVvYQ5YFroG]
cirrhosis: 硬化[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ T&}M5n +=*4zsB\N/~tFroG]
chlorogenic acid: 绿原酸[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ =a:T{@cD)EI4Hgq5xFroG]
glucose concentration: 葡萄糖浓度[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ Z,coH]6?aXDseHR^ FroG]
cardiovascular: 心血管的[文章版权 禁止转载:考试与评价 http://www.trgroup.com.cn/te/ (%q}cDU\HAt|Na XFroG]
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