Patients with coeliac disease almost always have specific variants of HLA-DQ2 and HLA-DQ8. These variants are necessary, but not sufficient, for the disease to occur. Up to 30% of some Caucasian populations have these specific variants, but only 5-10% of such people ever develop coeliac disease.
If you’re looking for a comprehensive assessment of your thyroid function, including an investigation of an underlying autoimmune disorder, then this combined thyroid antibodies test and thyroid function test is the blood test for you.