Is IgG Unverträglichkeitstest useful for Allergie?

IgG food intolerance tests are often marketed for allergy diagnosis, but they are not scientifically validated for detecting true allergies (IgE-mediated). The IgG antibodies measured typically reflect normal immune exposure to foods, not intolerance or allergy. Major allergy organizations, such as the EAACI, advise against these tests because they can lead to unnecessary dietary restrictions and nutritional deficiencies. For suspected allergies, specific IgE blood tests or skin prick tests are recommended. The evidence for IgG testing is weak and largely marketing-driven. Caveat: No validated biomarkers from the provided context; genetic data (MTOR, CD3E, APOB, COMT, ADH1B) are irrelevant to IgG allergy testing.