About to do my 5th flush. I Feel better. Digestion 100% better. Anyway I got a book by Andreas Moritz . You should check it out. Tells you so many good things about how to flush, the benefits, detailed explanantions, etc. I flush about once a month. Can do every 3 weeks but no closer. No Stones for me the first time but after that - yes. Some bigger ones on the 3rd flush. After that I felt a difference in my digestion!