2. Sweet Potatoes

Loaded with water and fiber, sweet potatoes have enough carbs to fill you up quickly without filling you out. A medium-sized sweet potato with skin included offers only 103 calories and 27g of carbs with about 5g of fiber, 37% daily value of vitamin C, as well as vitamin E, potassium, and phytochemicals like lutein, carotene, and zeaxanthin. They are fat free and increase levels of a hormone called adiponectin that regulates blood sugar and speeds up metabolism.