Olive oil contains no colesterol. Only animal fats contain colesterol. Olive oil can even lower colesterol.
I do not see how any kind of studies with animals and olive oil can be compared to humans and olive oil effects.
The purpose of the Liver Flush IS to make the gall bladder contract and expell stones. The reason that we take Epsom Salts before drinking the oil is so the gall bladder ducts are relaxed so the stones can pass out of it easily.
If the rare possibility should occur of a stone getting stuck upon exit, another Liver Flush the next day will free the stuck stone. I cannot remember of this happening to any one. I suppose it could happen in theory....however, as I said another Liver Flush will free a stuck stone.