TTG IGA Negative & Still Celiac?

Celiac disease is commonly found when a patient reports symptoms to their doctor. Simple blood tests are run. Most commonly the Tissue Transglutaminase IGA or TTG IGA test is done. The TTG IGA test often determines if further celiac testing is warranted. The reliance on the TTG IGA test to determine further celiac testing may be a bit overblown. I'll explain.