Foods that contain good carbs include corn, whole-grain foods, sourdough bread and vegetables. More foods containing good carbs include sweet potatoes; legumes, such as lentils, peas and beans; milk; and fruit.
Good carbs contain a lot of fiber, which allows the blood to absorb the carbs at a steady rate. Bad carbs are refined and do not contain the fiber content of good carbs, resulting in health implications, such as a sudden rise in blood sugar and eventual heart disease. Foods containing bad carbs include white bread, white rice, pastries, soda and processed food as a whole. The National Academies Institute of Medicine recommends that adults obtain 45 to 65 percent of their calories from carbs.