According to many reserachers, these flashed stones have no relationship to gallbladder. Quoting from http://www.vegsource.com/klaper/qa02.htm

As all first-year chemistry students learn, when you combine a fat with an acid, the fat turns into soap - a classic saponification reaction. The "broken up gallstones" in the feces are actually chips of olive oil soap, created in the intestine by the action of acid (the citric acid in the lemon juice) upon fat (the olive oil). To those unaware of the underlying chemistry, the appearance can look like a spectacular "cure," when it is merely an illusion of a "gallbladder cleanse.

I am confused ... where is the truth ... can anyone offer more information?