yes, malic Acid does work bou it reaches the stones located in the fron of your gb, the one in the back are usually not reached by the effects of the acid.
I ´ve done 20 flushes so far and lately I´ve been using Artichoke tincture to help my bile to move and Chanca Piedra(Stone Breaker-Tincture) and they realy work and prevent you from having liver and gb problems. An alteranative to these would be Mrs Chang´s tinctures(www.sensiblehealth.com). Chinese bitters help to move the bile and GCG is a great stone breaker /softener.