Blueberries: Research has shown that a diet rich in blueberries may help diminish belly fat. Even if blueberries are frozen, they maintain most of their nutritional benefits. And you can use frozen berries in this fat-belly fighting smoothie. Get Healthy, Healthy Tips, Healthy Choices, Healthy Snacks, Healthy Recipes, Healthy Nutrition, Paleo Diet Food List, Pku Diet, Detox