One recent study found that people were able to burn up an extra 450 calories a day with one hour of moderate exercise. That can include walking briskly, biking or swimming. hide caption

itoggle caption

A photo from 2009 shows "All Natural" Necco Wafers. But after customers rejected the changes, the Massachusetts company returned to its original recipe.

Charles Krupa/AP hide caption

itoggle caption Charles Krupa/AP

The Institute of Medicine wants the FDA to adopt new food labels that make it easier for consumers to compare the healthfulness of food products.

iStockphoto hide caption

itoggle caption iStockphoto

French Laundry pastry chef Lena Kwak with the gluten-free flour she developed.

Sara Davis/Thomas Keller Restaurant Group hide caption

itoggle caption Sara Davis/Thomas Keller Restaurant Group

McDonald's says it introduced Happy Meals with apple slices to "help customers make nutrition-minded choices for their daily lifestyles."

Keith Srakocic/AP hide caption

itoggle caption Keith Srakocic/AP