The reason I believe it's parasites is because I've been tested for everything else under the sun. I have about 30 to 35 non specific symptoms if I listed them all. I know I listed most in an older post I made on here. But the majority of those symptoms are exactly what people are experiencing that have parasites. I'm talking the really weird symptoms too, not common ones. I was in Jamaica in 2010, ate some weird stuff (shellfish included) got bit by a zillion mosquitos, I've had pets in the past with roundworm infection that I didn't know about and weren't the most careful around about washing my hands and whatnot..My wife was diagnosed with Toxocara but is not in the active stage..So many reasons and so many symptoms. Symptoms that seem to be ruled out with other conditions but go right along with the weird stuff you hear about people having. Hope that explains some of it at least.