For me personally I first tried Clarkia . I didn't really notice much of a difference and never saw parasites or worms. After that I tried ParaGone and liked it much better. I still did not see any parasites or worms but I did get lots of yellow floating specks and plaque and my BM's increased in frequency and size in the beginning. I did two boxes of ParaGone. I think I just may have passed a worm today. Not sure though. I can't see why I wouldn't see any till now but I guess anything is possible. I also have been eating pumpkin seeds and I pretty much eat cayenne pepper everyday. Sometimes I juice garlic.