How many calories in that doughnut? A Starbucks coffee shop in New York City displays calorie information next to menu items. New FDA rules will require all chain restaurants and similar eating establishments to post calorie labels. Chris Hondros/Getty Images hide caption

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A sign displaying calorie counts is seen in a Subway restaurant in New York City in 2008. A yet-to-be-finalized federal rule requiring big chain restaurants to post calorie counts has likely led eateries to tweak their menus. Mario Tama/Getty Images hide caption

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Wouldn't this salad make a healthful addition to your pizza for dinner? iStockphoto hide caption

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Spain's Alberto Contador eats a banana in as he rides in the pack during the sixth stage of the Tour de France on July 10, 2014. The cyclists aim to eat up to 350 calories an hour as they ride, and up to 9,000 calories a day. Laurent Cipriani/AP hide caption

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Not surprisingly, men like these guys cheering Sam Adams love beer. But more women than you might expect do too, according to a new study. Sarah Conard/AP hide caption

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Calorie counts like the one on this McDonald's drive-thru in New York are intended to help people make healthier choices. But researchers say they're often too confusing. Ed Ou/AP hide caption

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