New York City food carts would also be affected by Mayor Michael Bloomberg's proposal to ban sugary drinks 16 oz. and larger. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images

Karlton Hill, 15, was diagnosed with diabetes when he was 12. He works hard to manage the disease: He jogs and does pushups every day; he takes metformin is very careful about what he eats. Leslie Capo/LSU Health Sciences Center hide caption

itoggle caption Leslie Capo/LSU Health Sciences Center

The FDA hasn't approved a new weight-loss drug since 1999. In the meantime, Americans' waistlines have continued to grow. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

A tax proposal on the table in Massachusetts could discourage sugar consumption a bit by making sugary foods more expensive. Umberto Salvagnin/Flickr hide caption

itoggle caption Umberto Salvagnin/Flickr

Americans eat about 31 pounds of cheese per person each year, according to the U.S. Department of Agriculture. iStockphoto.com hide caption

itoggle caption iStockphoto.com