What do studies say about IgG Unverträglichkeit Genetik?

Scientific evidence for IgG-based food intolerance tests and their genetic basis is weak. IgG antibodies to foods are a normal physiological response and often indicate tolerance, not intolerance. Studies show that such tests do not reliably diagnose genuine intolerances like lactose intolerance, fructose malabsorption, or celiac disease. Genetics do play a role in real intolerances (e.g., LCT polymorphisms, HLA-DQ2/DQ8), but IgG tests ignore these mechanisms. The German Society for Allergology and Clinical Immunology (DGAKI) and other professional bodies advise against IgG testing. MyBody-X DNA tests do not measure IgG reactivity; they analyze genetic variants associated with metabolism or nutrient processing. The evidence for a direct genetic basis of IgG food intolerance is therefore weak and largely marketing-driven. Consumers should not rely on such tests and should seek medical diagnosis for symptoms.