Is IgG useful for Haut?

IgG testing for food sensitivities is often marketed for skin issues like acne, eczema, or rosacea, but scientific evidence does not support its usefulness. IgG antibodies indicate immune exposure—meaning the body has encountered a food—not an intolerance or allergy. True food allergies are mediated by IgE. Clinical studies show no consistent benefit of IgG-guided diets for skin conditions; major allergy societies (e.g., DGAKI) advise against such tests. For skin problems, consult a dermatologist and consider evidence-based approaches like IgE testing or supervised elimination diets. Home IgG tests lack validation for dermatological use and may lead to unnecessary dietary restrictions.