There is no standard formula for a Liver Flush (Gall bladder Cleanse). Although there is a difference in protocol, all do involve some combination of olive oil, herbs and juice while lasting 2 or more days. Depending on the source you reference, it may be advised you refrain from consuming regular food during this period. Before you begin be sure to consume a diet consisting of alkaline-forming foods for 3-5 days prior. Eating an apple once a day during this time will also help to dissolve some stones to help kick start the cleanse.