At NPR's Sound Bites Cafe, all food gets coded with one of three circles: Green is reserved for the most healthful dishes; yellow flags the "good choices;" and red signals the high-calorie foods to grab "on occasion." NPR hide caption itoggle caption NPR The Salt To Make Healthier Choices, Color-Code Your Food (Green Means Go!) January 7, 2014 Could a little red circle help you skip the comfort food this winter and maybe drop a few pounds? Doctors from Massachusetts General Hospital think so. They put traffic-light labels on their cafeteria's menu to signal the healthfulness of dishes. The colorful cues helped improve eating habits even two years later.