Dietary fiber is in fact a type of complex carbohydrate that cannot be digested, but cleans your digestive system, prevents constipation, lowers blood cholesterol and glucose levels. It consists of parts of plant foods your body cannot digest or absorb, it passes through the colon relatively unchanged and keeps our digestive system healthy. It also stabilizes the blood glucose and cholesterol levels in our blood. In countries with traditional fiber-rich food, diseases such as colon cancer, diabetes and CVD diseases have a lower incidence rate than in developed countries. Foods rich in dietary fiber are vegetables, beans, peas, fruits, nuts, almonds, unprocessed grains (wheat, rice, oats, barley) and unprocessed cereal products.