 Dis J 2000;19:584-5.<br /><br />  * Certain fruits and juices - for example prunes, apple juice, apricots - are rich in sorbitol, a nondigestible sugar that passes through the body to the colon and causes water to be retained or drawn into the stool mass. They can be increased in the diet to loosen the stool and relieve or prevent constipation.<br />  * Lactulose is a non-absorbable sugar product that is processed by colon bacteria to produce an inflow of water into the stool mass. We use it a 