Lay opinion vs evidence: IgG Unverträglichkeit Genetik

The idea that a genetic test can reveal IgG-based food intolerances is poorly supported by evidence. IgG antibodies to foods are often a normal immune response and not indicative of intolerance. Most commercial IgG tests (e.g., panels of 200+ foods) are considered invalid by medical societies such as the DGAKI and EAACI. Genetics do play a role in true intolerances (e.g., lactose intolerance, celiac disease), but not in IgG reactions. A DNA test cannot diagnose IgG food intolerance. The evidence base is largely marketing-driven. Consumers should not rely on such tests; instead, consult a doctor for symptom evaluation and use validated methods like elimination diets or oral food challenges.