(AP) — Hannaford stores feature the company's Guiding Stars rating system, as shown on a cereal price tag in a South Portland, Maine, store on Wednesday, Oct. 23, 2013.
A new study by researchers with the U.S. Department of Agriculture, the Food and Drug Administration and the University of Florida suggests that the rating system steers shoppers toward healthier choices in grocery stores. (AP Photo/Clarke Canfield)