Agar-agar is widely used as a treatment for constipation, but is usually employed with Cascara when atony of intestinal muscles is present. It does not increase peristaltic action. Its therapeutic value depends on the ability of the dry Agar to absorb and retain moisture. Its action is mechanical and analogous to that of the cellulose of vegetable foods, aiding the regularity of bowel movements. It is sometimes used as an adulterant of jams and jellies.