We're always being told by the Department of Health to eat five portions of fruit and vegetables a day. But it's not clear where the evidence for this comes from and a large study by the European Prospective Investigation Into Cancer and Nutrition (Epic) two years ago of the dietary intake of more than 400,000 people found only a weak link between eating fruit and vegetables and a reduction in overall cancer risk. There's no evidence it reduces breast or prostate cancer.

我们总是被健康部门告知一天要吃五份水果和蔬菜。但这不清楚这项结论来自于何方，一个由欧洲癌症与营养前瞻性调查(Epic)两年前对超过40万人的饮食摄入量的大型研究发现食用水果和蔬菜与降低整体罹患癌症的风险之间只有微弱的联系。没有证据表明它可以减少乳腺癌或前列腺癌的几率。

Even so, how could anyone argue against eating more fruit and vegetables? Well, it depends what fruit you're eating. A review article in the Canadian Medical Association Journal warns that a chemical in grapefruits can interact lethally with certain medicines. Even apple juice, the staple of many breakfast tables, may reduce our absorption of some drugs. Parents also often think fruit juice is a healthy alternative to fizzy drinks but juices contain sugar and calories too – as much as a glass of Coke (160 calories) – so should be drunk in moderation.

即便如此，怎么会有人反对吃更多的水果和蔬菜呢？好吧，这取决于你在吃什么水果。加拿大医学协会杂志上的一篇评论文章警告称葡萄柚中的一种化学物质可以与某些药物相互反应而致命。甚至苹果汁，许多早餐中的主食，可能会减少我们对一些药物的吸收。父母也常常认为果汁是碳酸饮料的健康替代但果汁也含有糖分和卡路里——高达一杯可口可乐的热量(160卡路里)，所以应该适度引用。

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