Switching the types of carbs you eat may help prevent weight gain, large study finds

Willett advised people to eat more: Whole fruits. Fruit juices should be avoided because the fiber has been removed. Nonstarchy vegetables, including spinach, kale, broccoli and carrots. Whole grains. The way to tell if a food is a whole grain is to check the label. Whole grain foods include whole wheat bread, whole grain pasta and oatmeal, as well as, popcorn, quinoa, barley and farro.