Is Zöliakie Test useful for blood sugar?

A celiac test (e.g., HLA-DQ2/DQ8 genotyping or antibody test) is primarily intended for diagnosing or ruling out celiac disease, not for assessing blood sugar. However, celiac disease can indirectly affect blood glucose: untreated celiac causes intestinal damage leading to malabsorption, which may cause blood sugar fluctuations – especially in individuals with concurrent type 1 diabetes (high co-occurrence). A positive genetic test alone does not indicate current blood sugar levels; it only shows genetic predisposition. Antibody tests (tTG-IgA) are relevant for active celiac diagnosis. For blood sugar management in metabolically healthy individuals or type 2 diabetics without celiac suspicion, the test is not useful. Evidence: mechanistic/observational, no direct clinical recommendation for blood sugar screening. Caveat: marketing often overstates the link. If celiac is suspected (e.g., unexplained hypoglycemia, weight loss), consult a physician.