stones are excreted through the rectum,the Epsom Salts clear out the bowels and relax the gallbladder thus having two purposes 1.relaxer to help release stones 2.clears out the bowels.the olive oil causes the bile to flow creating force to push the stones out and also help lubricate and break down the stones .the cleared out bowels are the next day flushed threw again with Epsom Salts to wash through the stones which may be caught in a collander over the toilet bowl.
Interestingly
The Epsom Salts are given to women to stop premature labour to relax the uterus.they are also given to anyone prior to having intestinal surgery to empty the bowel.