I should mention that some people have so much impacted fecal matter,that in extreme cases,the opening through which they defecate may be no larger than the diameter of a pencil!Adding a large amount of fiber suddenly could really do more harm than good,as they may become "plugged up".I would recommend either starting with a small amount,or better yet, use the oxy powder or colonosan as these seem to have a "dissolving" effect and speed up the process considerably.