A Twinkie shows off its creamy filling in this file photo from 2005. A snack-cake sales slump is one reason Hostess Brands is seeking protection from its creditors. Tim Boyle/Getty Images hide caption

itoggle caption Tim Boyle/Getty Images

Researchers looked at whether restaurants and stores that sold unhealthful food near high schools affected students' weight. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP