Are you having a cup of green tea everyday? 你有没有每天喝一杯绿茶呢？

Green tea has a long list of potential health benefits, from reducing the risk of Alzheimer's and certain cancers to improving cardiovascular, oral health, weight management. Now adding to the list is influencing brain function and boost working memory, according to a new study from University Hospital Basel in Switzerland.

绿茶有很多的健康益处，包括降低阿尔茨海默氏症（Alzheimer's）和某些癌症的风险，改善心血管疾病，口腔健康，体重管理。如今根据瑞士巴塞尔大学医院（University Hospital Basel）的一项新研究，再为绿茶添加了一项益处，那就是具有影响大脑的功能，提高工作记忆。

What is the main difference between all teas?

Green tea contains 30-40% of polyphenols, black tea around 3-10%, while oolong tea is somewhere between green and black tea. There are four major polyphenols found in fresh tea leaves, the one seems to be most potent and get the most attention is epigallocatechin gallate (EGCG).

绿茶和其他的茶有什么分别？

绿茶中含有30％至40％的茶多酚 （polyphenols），红茶约3-10％，而乌龙茶则是介于绿茶和红茶之间。新鲜的茶叶中，有四个主要的多酚类物质，而最有力效的和最得到关注的是儿茶素，epigallocatechin gallate（EGCG）。

Is it possible to achieve from normal diet?

Quite possible. The study adopted a green tea extract contained in whey-based soft drinks, the effects were linked to the doses consumed, with greater activation at higher doses. Since the polyphenols are water-extractable and dosage in beverage are generally not high, it is possible to achieve by daily consumption of green tea. Earlier, USDA's Agricultural Research Service (ARS) scientists pointed out that green tea in supplement form may not be a good alternative to tea leaves. 

Start taking green tea today, at least a good try to protect your brainy everyday! 

有可能从正常饮食中摄取到吗？

有可能。该研究使用的是乳清汽水饮料（whey-based soft drinks）中的绿茶提取物，喝得越多效果就越显著。由于茶多酚是水溶性的和一般上饮料中所含有的绿茶分量不高，所以，在日常饮食中是有可能摄取到的。此前，美国农业部（USDA）农业研究局（ARS）的科学家指出，绿茶提取物可能不是替代品茶叶的一个好选择。

从今天开始喝绿茶吧，至少是一个保护脑袋的好尝试！

Source: European Journal of Clinical Nutrition

来源：European Journal of Clinical Nutrition