只要和一个朋友提及自己生病了,那她就很有可能让你喝一大杯橙汁。但在你喝这种含糖饮料前(或者花钱购买新鲜水果),先了解这一点:近30项研究的综述发现橙汁、橘子或柠檬中的维他命C并不能缓解感冒症状或帮助你好的更快。事实上,由于橙汁的含糖量高,如果饮用过多则会加重病情,因为糖会加速炎症。
There is just one caveat: Downing a whopping 8,000 mg of vitamin C—the equivalent of 64 glasses of juice—at the first sign of symptoms might make you feel better, according to the review. But there's no way you're drinking 64 glasses without going into a sugar coma or gaining 10 pounds. So what about taking the same amount in supplement form? Sorry, but taking a pill with more than 2,000 mg vitamin C could cause vomiting, diarrhoea, abdominal pain, and even kidney stones. And it wouldn't be worth it: Doctors say the body can only absorb about 500 mg at one time, whether it comes from food or a pill.
还有一个警告:研究综述表明,感冒初期吃下8000毫克的维生素C会让你好很多——等于64杯橙汁。但是喝下64杯橙汁肯定会让你进入昏迷状态(糖摄入量过多)或是长胖10磅。那么以补充形式摄入同等量的维C行不行呢?对不起,维生素C片摄入量超过2000毫克会引起呕吐、腹泻、腹痛、甚至是肾结石。而且还会不值得:医生说人体一次只能吸收500毫克的维C,不管是来源于食物还是药片。
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