Root vegetables are some of the healthiest and heartiest foods you'll find because they grow underground and absorb nutrients directly from the soil. Although they all have their own specific set of health benefits, many share the same characteristics. They all tend to have vitamins A, B, and C, as well as iron. They're also filled with carbohydrates and fiber, both of which help you stay full, regulate your blood sugar, and help your digestive system. As a result, these low-calorie root vegetables are an ideal food if you're hoping to stay healthy or lose some weight.