<<Disclaimer: Verify this information before applying it to your situation.>> Hi, Has anyone had any experience with York Nutritional Laboratory http://www.yorkallergyusa.com/ or Great Smokies Diagnostic Laboratory http://www.gsdl.com/home/ ? I have been considering using one or the other for their tests for IgG. I am probably not celiac since a biopsy was negative, but my stomach has improved, but not gotten totally better, with a diet that cut out wheat as well as a number of other things. Since I never get to where I don't have some symptoms (excessive gas and bloating, stomach ache, nausea) I was thinking testing might show other foods I was sensitive to. If anyone has used either for testing, did not having been eating certain foods make a difference to the testing? I will summarize any answers. Thanks, Cindy *Support summarization of posts, reply to the SENDER not the CELIAC List*