Here is my experience. I did a Liver Flush at the 2 week point of a 4 week juice fast. I got sick and did not pass any stones. I did a 3 day juice fast with a Liver Flush on the second day. I did not feel sick and passed a lot of big stones. My digestion and the bacteria in my gut were great for a couple of weeks after that until more stones moved forward to cut off bile flow.