葡萄酒具备的健康价值

红葡萄酒一直以来都被推崇为一种健康饮品。如今，葡萄酒中据说有益健康的成分──白藜芦醇──在日常营养补充品、饮料、甚至一种新的营养食品（销售商宣称这种营养棒可以帮助你延年益寿，有助于预防癌症和其他疾病）中也可以获得了。直到最近之前，白藜芦醇有益健康的证据都只限于动物试验数据，不过现在初步的人体试验已经得出了让人感兴趣的结果。
Red wine has long been touted as a health elixir. Now wine's purported health-giving ingredient, resveratrol, is available in daily supplements, beverages and even a new nutritional bar claimed by sellers to help you live longer and help prevent cancer and other diseases. Until recently, the evidence for resveratrol has been animal data, but preliminary human testing has yielded intriguing results.
　　
白藜芦醇是葡萄和其他植物中的一种成分。市场上的很多营养补充品都是从日本结草中提取白藜芦醇，而结草是一种既丰富又便宜的白藜芦醇来源。瑞士Royal DSM NV公司销售一种人工合成的“resVida”。营养补充品、一种非酒精水果口味饮料和新推出的Winetime巧克力水果棒中都含有这种成分。
Resveratrol is a substance found in grapes and other plants. Many of the supplements on the market extract it from the Japanese knotweed plant, which is a plentiful and inexpensive source. Switzerland's Royal DSM NV sells a synthetic version called resVida, which is found in supplements, a nonalcoholic fruit-flavored beverage and the new Winetime chocolate-fruit bar.
　　
研究人员在动物试验中发现，白藜芦醇可以防止或放缓从癌症到心血管疾病等一系列疾病的发展，甚至能延长一些生物体的寿命。自2008年以来，在科学会议上至少展示了五项人体试验，表明白藜芦醇有益人体，包括改善心脏血液流动、更好地控制糖尿病等。
Resveratrol has found been found in animal studies to prevent or slow progression of illnesses from cancer to cardiovascular disease -- and even to extend the life span of some organisms. Since 2008, at least five human studies have been presented at scientific meetings showing human benefits, ranging from improved blood flow to the heart to better control of diabetes.
　　
最新的结果令人振奋，不过一些科学家说，公众开始服用营养补充品还为时尚早。取决于剂量的不同，一片营养补充剂中白藜芦醇的含量相当于数十甚至数百瓶葡萄酒的含量。目前还不知道对人体适宜的剂量，而且并不是说越多越好。
The newest results are exciting, but some scientists say it is too early for the public to begin taking supplements, which contain as much resveratrol in one pill as dozens or hundreds of bottles of wine, depending on the dose. The proper dose for humans isn't yet known -- and more isn't necessarily better.