Fiber attaches itself to the buildup found in the colon wall, pulls it out and makes the colon clean and clear from disturbances. This makes it easier for the body to digest food and in the long run, prevents the development of colon cancer. A similar process takes place in the valves of the heart whereby fiber flushes out the buildup of fat and cholesterol in the heart, protecting the body against heart attacks, heart disease and strokes.