Ask Well: Is Watermelon Good for You?
西瓜有多好?你可能不知道
Question:
问：
Is watermelon good for you? How much?
西瓜对人体有好处吗?有多大好处?
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.
西瓜营养丰富，包括维生素A、维生素C、B族维生素和钾，但西瓜最有用的成分是番茄红素，即让西瓜呈现出深红色的那种抗氧化剂色素。一些研究表明，番茄红素可能有益于心血管健康，包括降低中风风险，并且吃西瓜可能会轻微降低血压。研究人员还对番茄红素在预防各类癌症上可能起的作用进行了研究，不过证据不足。
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.
西瓜的血糖生成指数高——这是一个衡量食物提高血糖水平的能力的指标，这也进一步增加了人们的困惑。实际上，高含水量使西瓜的生糖负荷降低，也就是说按照常规的量食用西瓜不会导致血糖水平迅速升高。
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