I agree, there possibly could be parasites. I use to be able to take things like enzymes and probiotics, and they would help immediately. Now they seem to have no effect. I had a stool sample taken and evaluated a while ago, but nothing was determined. Right now I'm trying to take raw apple cider vinegar and batine HCL. Neither of those so far seem to make a difference. There is still this lingering bloated uncomfortable feeling on my left side only.