Many Americans aren't getting the recommended seven to nine hours per night. Franck Camhi/ hide caption

itoggle caption Franck Camhi/

Doctors may recommend that obese patients use weight-loss drugs to trick their hunger pangs. hide caption

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Billionaires John and Laura Arnold are betting that the country's top nutrition researchers can get to the bottom of the obesity epidemic. Courtesy of the John and Laura Arnold Foundation hide caption

itoggle caption Courtesy of the John and Laura Arnold Foundation

Customers line up for farmers market produce on a corner in Washington, D.C., where people eat more fruits and veggies than in many states. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Shannon Orley, left, meets with her health coach, Kelly Heithold, right, at Providence Alaska Medical Center. Annie Feidt for NPR hide caption

itoggle caption Annie Feidt for NPR

Rheumatoid arthritis is an autoimmune disease that can cause painful inflammation in the fingers and other joints. Richard Rudisill/ hide caption

itoggle caption Richard Rudisill/

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