Bacon is cut from the pig's belly, and is one- to two-thirds fat. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

First lady Michelle Obama and Bill Simon, president and CEO of Wal-Mart's U.S. unit, at a media briefing on the company's food initiative held in Washington, D.C. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images

Antonio Garcia re-stocks the beverages at The Corner Market in Washington, D.C., in 2010. Study author Jean Welsh says that sweetened beverages tend to be the biggest source of added sugar. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP