How are tTG IgA and Blutzucker related?

tTG IgA (tissue transglutaminase antibody) is a specific marker for celiac disease. There is no direct causal relationship with blood glucose (Blutzucker). However, untreated celiac disease can cause intestinal damage leading to malabsorption, which may result in erratic blood sugar levels (hypoglycemia or postprandial fluctuations). Additionally, celiac disease is strongly associated with type 1 diabetes (both autoimmune conditions). Therefore, if tTG IgA is positive, blood glucose (fasting glucose, HbA1c) should also be evaluated. Evidence for the celiac–diabetes link is human-strong; for general blood sugar effects it is more mechanistic/practice. A tTG IgA test alone does not measure or predict blood sugar. Caveat: Do not self-diagnose; consult a physician for symptoms like abdominal pain, fatigue, or weight loss.