I believe that it can be caused by parasites but that is not the answer for me. I have done the parasite killing thing....wormwood etc. I have had 10 colonics and no parasites forthcoming. As to the bile conclusions, I have tried a number of different products that increase bile and all it did for me is give me irritation when I poop. I have tried 3 liver flushes...never again because no results except feeling like crap. I have had IBS for 20 years and still going.
I am trying HMF intensive probiotics and have had minimal results, but better than any other probiotic I've tried. Samento seems to help the most except it is so hard to deal with the die-off symptoms. One drop is hard on me, but I will continue to take it till I perservere.
Well, anyway, I am glad for you that the Liver Flushes are helping you. Are you IBS cured now?