Treating refined sugar as the addictive substance it is, and keeping those products in a separate part of the store rather than at the checkout line. Removing subsidies for unhealthy ingredients, subsidising healthier ones. More education in schools. Better funding and requiring school districts to meet certain quality standards for the food they provide to children. Ensuring all children have the right to a healthy meal. Where previous initiatives have fallen short, critically evaluate why and make them better. Thinking about social psychological factors for our collective mental health and thinking about how this influences our dietary and exercise choices.
There are lots of actions that could be taken that are not just pharmaceutical.