<<Disclaimer: Verify this information before applying it to your situation.>> Hello, I just found that the tissue transglutaminase test that I was given to determine whether I have CD or not was based on IgA, not IgG. I was positive for anti-gliadin IgG, but negative for anti-gliadin IgA. To my knowledge, I was never tested for total IgA, so I'm not sure whether I might be IgA deficient. Is it common practice to use an IgA test for tissue transglutaminase? Should I consider this result questionable? If I request a total IgA test, what would be the normal range, and what would constitute deficiency? Would I need to be consuming gluten to get the total IgA test now that I have been GF for some time? Thank you, Erin _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail *Support summarization of posts, reply to the SENDER not the CELIAC List*