Ultra phos is a vasodilator. It relaxes vessels, including the Common Bile Duct. I have never seen anything get stuck in the Common Bile Duct with the Coke, lemon and olive oil flush because the Ultraphos makes sure the Common Bile Duct can relax and allow whatever is in the Gallbladdeer and liver to pass.
ES also relaxes the Common Bile Duct but it also draws water from the systems.
Many people mix the two and match different specific of one flush with the other. And I've got a line on a brand new flush that a friend of mine is developing that looks very promising. I'll keep this forum posted on that.
The Ultraphos is a vasodilator which relaxes the Common Bile Duct so nothing gets stuck on its way out.