Evidence check: IgG in the context of Allergie

IgG testing is often marketed for food allergies and intolerances, but the scientific evidence does not support its use for diagnosing allergies. IgG antibodies indicate exposure to foods, not an allergic reaction. True allergies are mediated by IgE. Major allergy organizations (e.g., EAACI, AAAAI) recommend against IgG testing for allergies, as it can lead to unnecessary dietary restrictions and misdiagnosis. If an allergy is suspected, consult an allergist for proper IgE testing or skin prick tests. The evidence for IgG in allergy context is weak and largely marketing-driven.