What to watch with IgG Unverträglichkeitstest and weight loss?

IgG food intolerance tests are often marketed for weight loss, but the evidence is weak. These tests detect IgG antibodies, which are a normal immune response to food and not indicative of intolerance or allergy. Studies have not shown that IgG-based elimination diets lead to significant weight loss. In fact, unnecessary dietary restrictions can cause nutrient deficiencies and disordered eating. For sustainable weight loss, focus on calorie balance, macronutrient quality, and behavioral changes. Genetic tests (e.g., APOA2) also lack clinical utility for diet matching, as shown by the DIETFITS trial. Be cautious of marketing claims: no consumer test replaces professional guidance. If you suspect a true food allergy (IgE-mediated), consult an allergist.