One notable feature of Blue Zones is diet. Okinawans, for example, follow a plant-based diet includes soy in various forms (soy is a member of the legume family), and includes grains, vegetables, fish, and limited meats. They also practice eating until only feeling about 80% full, knowing that it takes time for the stomach to signal to the brain to stop eating. This is a good way to address portion control as it keeps it simple while asking us to pay attention to the messages our bodies send us throughout the day. This population has a notably low rate of heart disease, stroke, and cancers.