wie lange gluten essen vor zöliakie-test — what symptoms are typical?

For a reliable celiac disease test (serology + duodenal biopsy), you must consume gluten daily for at least 6 weeks before testing. The standard recommendation is to eat at least one serving of gluten-containing foods (e.g., wheat bread, pasta) per day. Without this gluten challenge, antibody levels (especially tTG-IgA) may be falsely negative, and the biopsy may not show the characteristic villous atrophy. Typical symptoms of celiac disease include chronic diarrhea, bloating, abdominal pain, fatigue, iron-deficiency anemia, weight loss, and dermatitis herpetiformis (an itchy skin rash). However, many patients have atypical or even silent celiac disease, so symptoms alone are not reliable. The evidence is based on clinical guidelines (e.g., ESPGHAN, ACG) and decades of practice. Important: Do not start a gluten-free diet before testing, as it can normalize antibodies and histology, leading to a false-negative diagnosis. If you have severe symptoms, consult your doctor before increasing gluten intake.