I would check for parasite using the Metametrix GI test - use panel #2105. parasites are very hard to detect but this test is superior to any other test. I would also check vitamin D3 status, check or treat for heavy metals, make sure I was using nutritional support and use detox methods for metals and environmental poisons. Liposomal glutathione is awesome but start very slowly - it will help in detox (liver) etc.