小顾点评：
我记得去年也有报道茶和糖尿病可以预防2型糖尿病，那是荷兰的一个几万人的流行病学研究，其结论是摄取咖啡因越多患糖尿病的机率就越小，也就是说咖啡的作用主要在咖啡因，和这篇研究结论相矛盾。
抛开是什么在起作用的问题不谈，仅这种刺激性饮料可以预防糖尿病的结论就和中医的理论不太符合，中医一般认为咖啡中的咖啡因有利尿作用，促进肾脏的水钠排泄，并且造成精神亢进，容易兴奋、失眠和焦虑，这些大多都是阳亢阴虚的症状。而消渴(糖尿病)大多正是肾阴亏虚，肾不藏精造成的。
难道是人种问题？
Can Tea And Coffee Prevent Type 2 Diabetes?”
茶和咖啡可以预防2型糖尿病吗
转自丁香园，08liqiao编译
Researchers claim that drinking at least three cups of tea or coffee a day can reduce your risk of developing Type 2 diabetes by 42 per cent.
研究人员称，每天至少三杯茶或咖啡可减少百分之四十二患2型糖尿病的风险。
The Dutch scientists, from the Julius Centre for Health Sciences and Primary Care, University Medical Centre in Utrecht, evaluated questionnaires filled in by 40,000 people. They concluded: "Both coffee and tea consumption were associated with a lowered risk of Type 2 diabetes. Blood pressure and intake of magnesium, potassium and caffeine did not explain these associations."
来自朱利叶斯健康科学和基层医疗服务中心、乌得勒支大学医学中心的荷兰科学家，做了四万人的评测问卷。喝茶和咖啡都与患2型糖尿病风险的降低有关系。血压、镁、钾和咖啡因的摄入都不能解释这种关联。
Instead, it is suggested that the seemingly beneficial effects in tea were probably explained by 'flavonoid antioxidants'.
相反，茶或咖啡中可能有益的部分是黄酮类抗氧化剂。
Diabetes UK's response
“英国糖尿病”的回应
Dr James Pickett, Research Officer at Diabetes UK, said: "This is interesting research, however it does not prove that coffee and tea protect against Type 2 diabetes. This is because it is impossible to know what other factors might affect a person's risk of developing the condition.
英国糖尿病研究人员詹姆斯博士说：这是一个有趣的研究，但是它并不能证明咖啡和茶有预防2型糖尿病。因为并不知道是否有其他的因素可能影响人们患此病的风险。
Lifestyle factors
生活方式因素
"The development of Type 2 diabetes is strongly linked to lifestyle, which means that many cases could be prevented. The best way to prevent Type 2 diabetes remains keeping active and eating a healthy balanced diet that is low in fat, salt and sugar with plenty of fruit and vegetables."
2型糖尿病的发展与生活方式密切相关，很多情况都可以起到预防作用。最好防止该病的方法，还是坚持运动、健康均衡低脂低盐低糖饮食并多吃蔬菜和水果。
Source
Diabetes UK
来自“英国糖尿病”
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