Myths vs facts: IgG Unverträglichkeitstest and gut health

IgG food intolerance tests are often marketed as a breakthrough for gut health, but the scientific evidence is weak. IgG antibodies merely indicate immune exposure to food proteins – a normal physiological response, not a sign of intolerance or allergy. True food allergies involve IgE; intolerances are typically due to enzyme deficiencies (e.g., lactase) or irritants (e.g., FODMAPs). Major medical societies (e.g., EAACI, AAAAI) advise against IgG testing because it leads to unnecessary dietary restrictions, nutritional deficiencies, and anxiety. Gut health is complex, influenced by microbiome diversity, diet, stress, and medications. An IgG test cannot diagnose gut issues. For persistent symptoms, evidence-based approaches like breath tests, stool analysis, or supervised elimination diets are recommended. MyBody-X does not offer IgG tests; the DNA and microbiome tests in our portfolio have different, clearly communicated limitations. Bottom line: IgG tests are marketing, not evidence-based medicine.