What do studies say about IgG Unverträglichkeit Alltag?

The provided context does not contain studies on IgG intolerance in daily life. IgG food intolerance tests are controversial: major allergy and immunology societies (e.g., DGAKI, EAACI) advise against them because elevated IgG levels often reflect normal immune exposure to foods, not intolerance. Clinical trials show inconsistent symptom improvement (bloating, fatigue, headache) with IgG-guided elimination diets. The evidence is largely mechanistic or marketing-driven, not from robust human trials. Consumers should know these tests are not diagnostic and may lead to unnecessary dietary restrictions. For genuine intolerances (lactose, fructose), validated breath tests or physician-supervised elimination diets are recommended.