We have all different species of flukes inside of us. It all depends on how infected a person is to how many cleanses it takes. I am older (53) and it took me 4 cleanses to get everything out. I seen only a few flukes on my 4th cleanse but I also did 4 Liver flushes which helped get them out faster. If you are very toxic then Rg recommends doing a Plain Liver Flush before the Humaworm and then 7 days after finishing the Humaworm because the Humaworm will stay in your system about 7 days after your last day. I am going to do one more Humaworm cleanse in 90 days and see what happens and then start on my twice a year program for the rest of my life. I will do the in between herbs that Rg has listed for sale on his website and try that and see what happens. We all need to listen to what our bodies are telling us. The way we feel and what we are seeing come out. For me, I feel so much energy since doing the Humaworm and the Liver Flushing and colon cleansing. If you have followed my testimonies, then you will know that I was in very poor health before Humaworm. Donna