What to watch with IgG Unverträglichkeitstest and Haut?

When considering IgG food intolerance tests for skin issues (e.g., eczema, acne, urticaria), caution is warranted. The scientific evidence for these tests is weak: IgG antibodies to foods often reflect normal immune exposure, not true intolerance or allergy. True food allergies are diagnosed via IgE antibodies and controlled oral challenges. IgG tests are not recommended by major allergy societies (e.g., DGAKI, EAACI) because they frequently yield false positives and lead to unnecessary dietary restrictions. For skin conditions, other causes such as histamine intolerance, contact allergies, or inflammatory processes should be investigated. An IgG test does not replace a medical workup. Furthermore, self-prescribed elimination diets risk nutritional deficiencies. A more evidence-based approach includes allergy testing (IgE, skin prick test), symptom diaries, and supervised elimination diets. The marketing of IgG tests as a 'skin solution' is problematic – the evidence does not support routine clinical use.