Evidence check: IgG Unverträglichkeitstest in the context of Abnehmen

IgG food intolerance tests are frequently marketed for weight loss, but the scientific evidence is weak. These tests measure IgG antibodies to foods, which are often a normal immune response and not indicative of intolerance or allergy. Clinical studies have not demonstrated that IgG-guided elimination diets lead to significant weight loss. Moreover, unnecessary food restrictions can cause nutrient deficiencies and reduce dietary quality. Sustainable weight management relies on energy balance, macronutrient composition, and lifestyle changes—not IgG levels. Major health organizations, including the German Society for Nutrition, advise against using these tests for weight loss. Evidence rating: marketing, no clinical validation in weight loss context. Caveat: For true IgE-mediated allergies, different diagnostic approaches are required.