Americans need to adopt a more plant-based diet, rich in fruits and vegetables, according to a recent report that proposed updates to federal dietary guidelines. And for good reason: Plants offer a host of health benefits. Aside from their fiber, vitamins, and minerals, evidence suggests that fruits and veggies contain compounds that play a role in preventing certain cancers as well as heart disease and stroke, for which supplements are no substitute, says dietitian Elizabeth Pivonka, president of the nonprofit Produce for Better Health Foundation.

美国人需要进行一个以更多植物为主的饮食，富含水果和蔬菜，按照最近一个报道建议更新联邦膳食指南。因为有好的理由：植物提供有关健康的许多好处。除了它们所含有的纤维，维生素和矿物质，证据显示水果和蔬菜中含有对预防一些癌症，心脏病和中风有用的化合物，这些是补充剂所不能代替的，营养学家，非营利性的更保健农产品基金会主席Elizabeth Pivonka说。

Beta carotene found in carrots and sweet potatoes, for example, has been shown to help protect against lung cancer, but may be harmful when taken in pill form. And the latest research suggests that calcium supplements may raise the risk of heart attacks in adults while doing little to benefit bone health. (That's why some researchers are now encouraging folks to get the nutrient in their diet instead. Spinach and broccoli are good sources.)

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