People following a 5-2 diet would eat lean protein and non-starchy vegetables two days a week. Heather Rousseau/NPR hide caption

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Much of the palm oil imported into the U.S. ends up in snack foods such as cookies, crackers and microwave popcorn. Heather Rousseau/NPR hide caption

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Skipping breakfast is risky. iphoto hide caption

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Farmer Geronimo Blanco shows his quinoa plants in Patamanta, Bolivia, in February. A burgeoning global demand for quinoa has led to a threefold price increase since 2006. Juan Karita/AP hide caption

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The FDA's proposal follows concerns raised by consumer groups about levels of inorganic arsenic, a carcinogen, in apple juice. iStockphoto.com hide caption

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Riley Casagrande churns butter with her dad Jerry Casagrande. Allison Aubrey/NPR hide caption

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Eating refined carbohydrates like bagels may stimulate brain regions involved in reward and cravings, research suggests. iStockphoto.com hide caption

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Researchers at Rice University conducted lab studies using light-dark cycles to try to coax more beneficial compounds out of fruits and vegetables. Heather Rousseau/NPR hide caption

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