Re: Prunes and elimation

Do you refer to this isatin?

"Often associated with the elderly and their constipation problems, prunes do have a laxative effect that is much easier on the body than any medication, and just as effective. Since prune juice is equally effective, but lacking in fiber, some food chemists suggest that another constituent other than fiber is the real reason they are so effective as a laxative. Prunes contain an unidentified derivative of the organic chemical isatin, which is related to another natural substance called biscodyl, the active ingredient in some over-the-counter laxative preparations. Biscodyl is a contact laxative that induces the secretion of fluid in the bowel and stimulates contractions of the intestines to push waste through the colon more quickly and efficiently."