How are IgG Unverträglichkeitstest and weight loss related?

The claimed link between IgG food intolerance tests and weight loss lacks robust scientific evidence. These tests measure IgG antibodies to foods, often marketed as identifying 'delayed food allergies' that cause inflammation and hinder weight loss. However, systematic reviews and allergy guidelines consistently state that IgG testing is not validated for diagnosing food intolerances or guiding weight loss diets. The evidence is primarily marketing: companies suggest that eliminating 'reactive' foods reduces inflammation, thereby facilitating weight loss. In reality, any weight loss observed is likely due to caloric restriction from eliminating many foods, not from addressing IgG-mediated mechanisms. Moreover, unnecessary dietary restrictions can lead to nutrient deficiencies, disordered eating, and reduced quality of life. No major medical organization endorses IgG-based elimination diets for weight management. Consumers should be cautious and consult a registered dietitian or physician for evidence-based weight loss strategies.