The Salt What's On Your Plate

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An FDA rule effective Aug. 5 states that foods may be labeled "gluten free" only if there's less than 20 parts per million of the protein. James Benet/iStockphoto hide caption

itoggle caption James Benet/iStockphoto

The BACTrack Vio keychain breathalyzer and app on the iPhone at NPR headquarters in Washington, D.C. A public health researcher says tools like this could help people make better decisions about alcohol use. Meredith Rizzo/NPR hide caption

itoggle caption Meredith Rizzo/NPR

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

itoggle caption Laurent Cipriani/AP

Soylent CEO Rob Rhinehart holds a bag of finished product in September 2013. Rhinehart recently discouraged members of the company's DIY online community from competing directly with Soylent. Josh Edelson/AFP/Getty Images hide caption

itoggle caption Josh Edelson/AFP/Getty Images

This young male, buried at a prehistoric site in Central Sudan, probably munched on the roots of a plant called purple nutsedge. Donatella Usai/Centro Studi Sudanesi and Sub-Sahariani hide caption

itoggle caption Donatella Usai/Centro Studi Sudanesi and Sub-Sahariani

A nutrient-dense diet may help tamp down stress. And these foods may help boost our moods (clockwise from left): pumpkin seeds, sardines, eggs, salmon, flax seeds, Swiss chard and dark chocolate. Meredith Rizzo/NPR hide caption

itoggle caption Meredith Rizzo/NPR

Organic fruits and vegetables deliver between 20 and 40 percent more antioxidants than conventional fruits and vegetables, a new study finds. Molly Marshall/Flickr hide caption

itoggle caption Molly Marshall/Flickr

Charlotte Smith, of Champoeg Creamery in St. Paul, Ore., says raw milk may offer health benefits. But she also acknowledges its very real dangers. Courtesy of Champoeg Creamery hide caption

itoggle caption Courtesy of Champoeg Creamery

Researchers say the polyphenols in dark chocolate can help the body form more nitric oxide, a compound that causes blood vessels to dilate and blood to flow more easily. iStockphoto hide caption

itoggle caption iStockphoto

(Top left, clockwise) Macmen N' Cheese; chocolate ramen; udon and egg. (Bottom row) Ramen fritatta; cannellini beans and spinach; and southwest taco from the book Rah! Rah! Ramen. Sara Childs/ Courtesy of Interactive Direct hide caption

itoggle caption Sara Childs/ Courtesy of Interactive Direct