Performance nutrition experts recommend stopping at all the hydration stations for a quick fill-up of a sports drink to replenish the glycogen that's being burned during a marathon. iStockphoto hide caption

itoggle caption iStockphoto

The salty suspects: Some 70 percent of the cheeses, soups, cold cuts and pizzas we buy at the grocery store exceed the Food and Drug Administration's "healthy" labeling standards for salt. Since we eat so much bread, it is — perhaps surprisingly — the top contributor of sodium to our diets. iStockphoto; Deborah Austin/Flickr; Beckman's Bakery/Flickr; iStockphoto; The Pizza Review/Flickr hide caption

itoggle caption iStockphoto; Deborah Austin/Flickr; Beckman's Bakery/Flickr; iStockphoto; The Pizza Review/Flickr

"There's no reason to believe that exposure to arsenic in food and wine is above levels that are considered to be safe," says Susan Ebeler, a professor and chemist in the Foods For Health Institute at the University of California, Davis. Erik Schelzig/ASSOCIATED PRESS hide caption

itoggle caption Erik Schelzig/ASSOCIATED PRESS

Celebrity chef Giada De Laurentiis during a guest appearance on ABC's The Chew last fall. She can cook rich foods and keep her trim figure, but new research suggests that's a difficult feat for amateur cooks watching along at home. Lou Rocco/ABC/Getty Images hide caption

itoggle caption Lou Rocco/ABC/Getty Images

A "ballet" of Brussels sprouts dazzles at the Food Porn Index, a site that tracks which foods are trending in social media part of an effort to heighten the appeal of healthy eating. via Bolthouse Farms hide caption

itoggle caption via Bolthouse Farms

A government-appointed panel concluded in a recent report that Americans should eat less red meat and processed meat. A more plant-focused diet is better for health and the environment, it found. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images