It was Dr.Clarks Liver & Gallbladder cleanse that I did. After reading all the diffrent ones I stayed with Dr. Clarks for my first cleanse because of the respect that I have for her research. Since I have several more to do I will probably try them all and Judge for myself which is best. I have heard the slugg theory and since I am not a doctor so I don't get into that argument. But I do know that I have had a constant disconfort in my Gallbladder for years and that was gone for a few hours after the cleanse. From what I hear the ones behind those that I released will then move forward filling in the empty space and cause the symtoms to return, which is what happened after a few hours. I will exspect that to go away after many more cleanses. But I have a long ways to go.