What to watch with IgG Unverträglichkeitstest and gut health?

IgG food intolerance tests are often marketed as a way to identify food sensitivities and improve gut health, but the scientific evidence is weak. IgG antibodies to foods are a normal physiological response to eating and do not reliably indicate intolerance or allergy. Major medical societies (e.g., DGAKI, EAACI) advise against using IgG tests for diagnosis because they frequently yield false positives and can lead to unnecessary dietary restrictions. For gut health, more evidence-based approaches include keeping a food-symptom diary, trying an elimination diet under professional guidance, or testing for specific conditions like lactose intolerance, fructose malabsorption, or celiac disease (IgA/tTG). IgG tests cannot distinguish between tolerance and intolerance and are not validated for clinical use. If you have taken such a test, interpret results with caution and avoid drastic dietary changes without consulting a healthcare provider. Supporting gut health through a diverse, fiber-rich diet, adequate hydration, and stress management is more effective than relying on unproven IgG-based elimination diets.