This document discusses food policies for healthier diets and whether policies should focus on adjusting the food environment or changing consumer behavior. It notes that food markets are dominated by supply-side agents and consumer choices marginally influence policies. It also discusses using various policy tools like regulations, incentives, and labeling to influence diets by either pushing changes on the supply side or pulling changes by nudging consumer demand and behavior. The document advocates that policies are needed to shape a favorable food environment and that social norms can also support improved consumer choices.