What was the lab reference range for IgA? I have read that the IgA antibody test is fine unless your IgA is less than 50% of the lowest number in the reference range. IgG antibody testing is an option too. Even if all tests come back normal though it is really only the biopsy that can give you a definite answer (and even then only if they know what they're doing and take enough samples. It can still be missed with only 1 or 2 samples). The Enterolab test is not recognised by a lot of doctors, I don't know whether it is accurate or not.