Sylvester Williams, a Denver Broncos nose guard, nabs Isaiah Crowell of the Cleveland Browns last October. If measured by BMI, Williams is obese. AAron Ontiveroz/Denver Post via Getty Images hide caption

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A Chipotle Mexican Grill employee prepares a burrito for a customer in Seattle. The CDC believes the two recent E. coli outbreaks at Chipotle restaurants are over. Stephen Brashear/AP hide caption

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Ben Lecomte has swum across the Atlantic Ocean, and now he aims to traverse the Pacific, which will take him five or six months. Bongani Mlambo/The Longest Swim hide caption

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These fiber-rich foods altogether offer about 28.5 grams, or a woman's daily recommended intake. Clockwise from top left: one pear, 6 grams of fiber; medium artichoke, 7 grams; 1 ounce of popcorn, 3.5 grams; 1 medium sweet potato, 4 grams; 1 cup edamame, 8 grams. Morgan McCloy/NPR hide caption

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Exposure to visual food cues like food ads can influence eating behavior and contribute to weight gain, a study published in the journal Obesity Reviews found. Nick Amoscato/Flickr hide caption

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The Super Food Express bus travels to schools in Mobile County, Ala., to ensure children are fed healthy meals when school is out of session. The bus is part of the USDA's summer food program, which President Obama says needs additional funding. USDA/Flickr hide caption

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Dole has voluntarily withdrawn from the market all of its Dole-branded and private label packaged salads processed at a Springfield, Ohio plant because the plant has been linked to a Listeria outbreak. iStockphoto hide caption

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The routines that students learn at Dance for PD classes in Venice, Calif., can be quite challenging, instructors say. Courtesy of Joe Lambie and Laura Karlin hide caption

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Studies show that kids' household income seems to be a more important predictor of their risk of becoming overweight and obese than their race or ethnicity. Raleigh News & Observer/MCT via Getty Images hide caption

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Teela Magar and Cing Neam prepare the roti dough as part of Edible Alphabet, a program in Philadelphia that folds English lessons for new immigrants to the U.S. into a cooking class. Students also learn about seasonality and healthful eating on a budget. Bastiaan Slabbers hide caption

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Democratic presidential hopeful Hillary Clinton walks past the peppers at the El Rey grocery store in Milwaukee, Wis., during a campaign stop in 2008. Clinton tells NPR that she eats a fresh hot pepper a day to stay healthy on the campaign trail. She may be on to something. Carolyn Kaster/AP hide caption

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Students at Doherty Middle School in Andover, Mass., choose items from the salad bar in the school cafeteria, June 2012. Among other things, a Senate compromise on school nutrition standards calls for the USDA and the CDC to establish new guidance that would encourage the use of salad bars. Melanie Stetson Freeman/The Christian Science Monitor/Getty hide caption

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