LOL! Gut problems! Same as me!
You ever do the Dr Clark cleanses? A nurse practitioner that I saw (one of many people in my journey to get well) told me about a study in which doctors gave patients with gut problems (can't remember what kind) a drink of parasite larve (yummy :-P) on the premise that they didn't have enough parasites, and it worked! Another thing in the evolution based book "paleolithic prescription" he talks about parasites helping digest extra iron in the diet, not so sure about the Science behind that but it is a idea.
I do know that bacteria like candida helps to decompose died things and that parasites feed off of candida.
God also gave us medicine: herbs, to combat health problems. Even at the jewish passover the herbs were bitter herbs (like a yearly cleanse, lol). That seems 'intelligent' design, you think?