What to watch with IgG Unverträglichkeitstest and allergy?

IgG food intolerance tests are widely marketed to consumers, but their scientific validity is weak. Major allergy and immunology organizations (e.g., EAACI, AAAAI) advise against using IgG tests to diagnose food allergies or intolerances. The presence of IgG antibodies often reflects normal immune exposure to foods, not an adverse reaction. True food allergies are IgE-mediated and cause rapid, sometimes severe symptoms. IgG tests can produce many 'positive' results that lead to unnecessary dietary restrictions without clinical benefit. If you have taken such a test, do not eliminate multiple foods without professional guidance. Instead, keep a symptom diary and consult an allergist or gastroenterologist for evidence-based testing (e.g., IgE tests, skin prick tests, or a medically supervised elimination diet). Also be aware that some labs combine IgG with other markers (e.g., complement, immune complexes) to appear more comprehensive, but this does not improve diagnostic accuracy. In summary: IgG tests are not reliable for diagnosing food allergies or intolerances; they are best viewed as a marketing tool rather than a medical test.