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

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To encourage healthy choices, Dow's corporate cafeteria features color-coded utensils. Healthy foods like broccoli, spinach and beets have green handles. Yellow handles mean caution, and red is for temptations like bacon bits and high-fat dressing.

Jennifer Ludden /NPR hide caption

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Would you remember exactly what was in this salad more than a week after eating it?

Luciana Bueno Santos (LuBueno)/ hide caption

itoggle caption Luciana Bueno Santos (LuBueno)/