Evidence check: IgG Unverträglichkeitstest in the context of Haut

IgG food intolerance tests are frequently marketed for skin issues like eczema or acne, but the scientific evidence is weak. IgG antibodies indicate immune exposure to foods, not necessarily intolerance or allergy. Studies show poor reproducibility and no proven clinical benefit for skin conditions. Major allergy societies (e.g., EAACI, AAAAI) recommend against their use due to high false-positive rates and risk of unnecessary dietary restrictions. For skin problems, evidence-based diagnostics (e.g., skin prick tests, specific IgE) and a dermatologist's evaluation are more appropriate. The role of IgG testing in dermatology remains unsupported by robust data.