Myths vs facts: IgG and Abnehmen

The claim that IgG testing aids weight loss is a common myth. IgG (immunoglobulin G) antibodies indicate past exposure to foods, not necessarily intolerance or allergy. Many commercial tests promote IgG-based elimination diets for weight loss, but the scientific evidence is weak. Studies show no significant long-term weight loss benefit, and major allergy organizations (e.g., EAACI, DGAKI) advise against using IgG tests for food intolerance diagnosis. True food allergies involve IgE antibodies. Any weight loss from IgG diets is likely due to placebo effects or reduced calorie intake from eliminating many foods. For sustainable weight loss, evidence-based approaches like calorie balance, balanced nutrition, and exercise are effective. Caveat: For confirmed intolerances (e.g., lactose intolerance), specific diagnostic tests exist, but IgG is not appropriate.