Keep in mind that blood tests for nutritional deficiencies may not be valid if you are already taking vitamin supplements. That may mask deficiencies. 

I think the confusing part may be the notation: "Tissue Transglutaminase (tTG) has been identified as the endomysial antigen. Studies have demonstr- ated that endomysial IgA antibodies have over 99% specificity for gluten sensitive enteropathy." It is simply an explanation of what the test was looking for. It is not a statement of something they found of concern. What they were looking for was in the negative range. So, based on this test alone, it does not appear you have celiac disease. But as Wheatwacked hinted at, there should have been more tests run. At the very least, a "total IGA" should have been ordered as well to test for IGA deficiency. If you are IGA deficient, then this could have skewed the Transglutaminase IGA result down toward the negative range. Another question should be asked that has a bearing on the validity of the test result you reported. Had you already been cutting back on gluten consumption when the blood sample was taken?

Hi @6faith6, welcome to the forum. Was this the only test run?  It is negative. Why was it run? Can you tell us about yourself and your symptoms? Country? I would guess you feel like crap and the doctors can't find anything wrong.

pipingrock.com ships international   https://www.pipingrock.com/international-shipping?keywords=shipping+to+canada&qid=1729725535 This is what I've been takine since 2015. High Potency Vitamin D3, 10,000 IU, 250 Quick Release Softgels $8.69 plus shipping and duties.  There are other options.

It's great that you're staying informed about your health. Elevated LDH levels can indeed have many causes, and while celiac disease can sometimes be linked to high LDH, it’s just one possible factor. Since your other blood work is normal, it's good to keep monitoring it and consult with your doctor to rule out any other potential causes.