Tissue transglutaminase IgA Blood Tests

A tissue transglutaminase IgA (tTg-IgA) test is used to help doctors diagnose coeliac disease. In this autoimmune disorder, the immune system mistakenly thinks that gluten — a protein in wheat, barley, rye, and oats — is a foreign invader. It makes antibodies that attack an enzyme in the intestines called tissue transglutaminase (tTG).

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