I have done some GB/ Liver Flushes with only olive oil and lemon juice and it does work. I have passed some 1cm or larger stones this way. I do prefer to use 2TBSP of magnesium citrate (natural calm) instead of the epsom which is not very "body friendly". Epsom is rough on my kidneys so I don't use it anymore. I think adding in the magnesium citrate does make it easier for the stones to pass as it relaxes the bile ducts a bit. The times I have done only oil and lemon juice I could feel some pinching in my GB as the stones passed through causing some discomfort. Your mileage may very though.