Can IgG help with Allergie?

The question 'Can IgG help with allergies?' requires careful clarification. In allergy diagnostics, IgE antibodies are the established marker for immediate-type (Type I) allergies. IgG tests, especially IgG4, are marketed by some labs for food 'intolerance' or 'delayed allergy' testing, but this is not supported by major allergy societies (AAAAI, EAACI, DGAKI). High IgG levels often simply reflect exposure to foods and are not diagnostic of allergy or intolerance. Using IgG results to guide elimination diets can lead to unnecessary restrictions and nutritional deficiencies. There is no robust evidence that IgG testing improves allergy outcomes. For reliable allergy assessment, specific IgE tests, skin prick tests, and clinical history are essential. MyBody-X does not offer IgG allergy panels; any biomarker results should be interpreted by a physician. Evidence: marketing/unclear. Sources: none in provided context.