After my PA tests came back negative, my doctor was convinced I had celiac. Got my results yesterday and celiac was negative. It's my understanding these tests are pretty accurate. They tested endomysial antibodies, transglutaminase IGA and IGG and they were all negative.
The only odd thing that has ever shown up was MCH of 31.7 and alkaline phosphatase of 28. I am also heterozygous for MTHFR. And I have all the symptoms of a B12 deficiency, which are mostly relieved by B12 injections.
For PA, I had intrinsic factor and parietal cell antibodies tested. So what are the odds of false negatives on both these tests? If that's not likely, what could be causing the B12 deficiency?