A Traffic-Light Label Intervention and Dietary Choices in College Cafeterias

Objectives. To examine whether traffic-light labeling and choice architecture interventions improved dietary choices among students at a northeastern US university. Methods. In 6 cafeterias at Harvard University, in Cambridge, Massachusetts, we implemented a 7-week intervention including traffic-light labeling (red: least nutrient rich; yellow: nutrient neutral; green: most nutrient rich), choice architecture (how choices are presented to...