People shop in a Miami grocery store on July 8. USDA says that despite the drop in unemployment, the number of food insecure Americans has not declined because higher food prices and inflation last year offset the benefits of a brighter job market. Joe Raedle/Getty Images hide caption

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Although food entrepreneur Tim West's family legacy is in Doritos chips, he wants to shake up the food system — with sustainable, healthful food. Vignesh Ramachandran/Ozy hide caption

itoggle caption Vignesh Ramachandran/Ozy

Currently, half of all products served in the school lunch program must be "whole-grain rich," which USDA defines as products made of at least 50 percent whole grain. According to the new standards, by the start of the next school year, schools must use only products that are whole-grain rich. Rogelio V. Solis/AP hide caption

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McDonald's was the featured sponsor of the annual meeting of the California Dietetic Association in 2014. Alan Broadhead/Flickr hide caption

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Nutrition researchers are reaching a new consensus: Cut back on all those refined carbs. And remember that some fat is good. Stacy Spensley/Flickr hide caption

itoggle caption Stacy Spensley/Flickr