Ask Well: Is Watermelon Good for You?

西瓜有多好?你可能不知道

　　Question:

　　問：

　　Is watermelon good for you? How much?

　　西瓜對人體有好處嗎?有多大好處?

　　Answer:

　　答：

　　Watermelon is rich in nutrients – including vitamins A and C, B vitamins and potassium — but where it really packs a punch is with lycopene, the antioxidant pigment that gives the fruit its deep red color. Some studies suggest that lycopene may have cardiovascular benefits, including reducing the risk of stroke, and eating watermelon may slightly lower blood pressure. Researchers have also looked at lycopene’s possible role in protecting against various cancers, though evidence is scant.

　　西瓜營養(yǎng)豐富，包括維生素A、維生素C、B族維生素和鉀，但西瓜最有用的成分是番茄紅素，即讓西瓜呈現(xiàn)出深紅色的那種抗氧化劑色素。一些研究表明，番茄紅素可能有益于心血管健康，包括降低中風(fēng)風(fēng)險(xiǎn)，并且吃西瓜可能會輕微降低血壓。研究人員還對番茄紅素在預(yù)防各類癌癥上可能起的作用進(jìn)行了研究，不過證據(jù)不足。

　　You can get lycopene from tomatoes, particularly cooked and stewed tomatoes, but “on a fresh basis, you can’t do better than watermelon,” said Penelope Perkins-Veazie, a professor at North Carolina State University in Raleigh who has studied lycopene and is an unpaid science adviser to the National Watermelon Promotion Board. Red watermelon has more lycopene than other watermelon varieties, and “seedless watermelon tends to have more,” she said.

　　And while watermelon has a high glycemic index, a measure of a food’s ability to raise blood sugar levels, that also adds to the confusion. In fact, its high water content gives it a low glycemic load, meaning it does not raise blood sugar levels quickly in amounts typically eaten.

　　西瓜的血糖生成指數(shù)高——這是一個(gè)衡量食物提高血糖水平的能力的指標(biāo)，這也進(jìn)一步增加了人們的困惑。實(shí)際上，高含水量使西瓜的生糖負(fù)荷降低，也就是說按照常規(guī)的量食用西瓜不會導(dǎo)致血糖水平迅速升高。

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