I have been taking Miracle-Mineral-Supplement but not for liver cleansing, just for general cleaning of my body. They do say often parasites might be involved in creating gallstones, so the Miracle-Mineral-Supplement might help, at least with cleaning the parasites.
Gallbladder/liver problems can come from a lot of reasons, so I hope Telman will come along and give you a more detailed explanation.
I must say that I have noticed my gallstone more since doing the Miracle-Mineral-Supplement , I don't know if this is good or bad, and have been liverflushing with it. For now I am taken a few days break from the MMS and just put a few drops straight in my drinking water to improve alkalinity.