I would not quit if I was getting results. Why change products if you have one that is working for you? However, it easy to confuse undigested food particles with parasites. Make sure that the critters you see in the toilet are really critters. Think about what you are eating. When you start cleansing the bowels, stuff comes out more quickly and it is often not very well digested. It is easy to mistake salad, mushroom, corn, peanuts, any kind of nuts, sesame seeds, tomato peels and the like for parasites. If the stuff coming out is accompanied by mucous, gray oily substance, black tarry substance and terrible odor, you are getting at the parasites. If it doesn't stink really bad, it may just be fresh food that didn't get completely digested.