The tube between the gallbladder and the small intestine is called the bile duct. The end of the bile duct is the ampule of Vater. The final part of the bile duct goes through the pancreas and shares a small part of the tube with the duct from the pancreas.
The ampule of Vater normally has about the same diameter as a pencil lead. So, what do you think would happen if you make a gallstone start traveling down the bile duct? Well, if it is smaller in diameter than a pencil lead, it should pass through without any problem. But, would it be big enough to even notice in your stool? Hardly!
In fact, if you were successful in making a stone larger than that leave your gallbladder and enter the bile duct, you would immediately become very uncomfortable. The pain would start under your ribcage in front on the right - or sometimes in your back - and pass across to the other side under your ribs. The pain would typically also go to your back on the right and cause nausea as well.
But those that push the liver cleansing diet don't ever even mention any possible complications like that. In fact, there are even worse possible complications. If a stone became stuck at the ampule of Vater, the back pressure could also cause inflammation of the Pancreas. That would result in Pancreatitis - a very painful and potentially fatal condition. These people often need emergency surgery.