Welcome to the forum, @Hope07! The reference range would refer to what is considered normal in healthy people. So, 7 or less would mean there is no indication of "active" celiac disease. Apparently, you are doing very will in avoiding gluten. The "Tissue Transglutaminase IGA" is the centerpiece antibody test that clinicians run when checking for celiac disease. My only reservation would be that whenever the TTG-IGA test is run, a "total IGA" test should also be run to check for IGA deficiency. When IGA deficiency is present, other IGA tests, such as the TTG-IGA can be artificially low and result in false positives. In the absence of any symptoms indicating your celiac disease is...