Epsom Salts is a Hyperosmotic saline type laxative which acts within 1-2 hours. It contracts the gallbladder, relaxes the sphincter of Oddi, increases gastric, intestinal and pancreatic secretion and production of cholecystokinin.
Choleccystokin is a substance that signals to the liver and gallbladder that bile is required by the duodenum.
The Spinccter of Oddi is a muscular valve that opens th bile duct to the duodenum. Epsom Salts should be given in dilute solution to a fasting individual.
Hyperosmotic saline type laxative means that the magnesia acts to pull a salt or saline solution into the intestines from the blood. This excessive fluid then provides a flushing or laxative action within the intestines. There is an inherent loss of salt from this process.
The Epsom Salts also purges the stomach of its contents ensuring that it is fully emptied to receive the flush potion.
The doses of Epsom salts taken after the flush potion at a time dependant upon the protocol adopted ensure the rapid transit of gallstones, stale bile and other potentially toxin debris through the intestines where it is evacuated without being re-absorbed. The ileum which is a part of the intestines just before the colon start is responsibly to reabsorbing 80 to 90 percent of the bile secreted by the liver and gallbladder.