Myths vs facts: IgG Unverträglichkeitstest and Darmgesundheit

IgG food intolerance tests are often marketed to improve gut health, but the scientific evidence is weak. Studies indicate that IgG antibodies to foods are usually a normal immune response and do not reliably indicate intolerance or gut barrier damage. Major allergy and immunology societies (e.g., DGAKI, EAACI) advise against these tests because they can lead to unnecessary restrictive diets and nutrient deficiencies. Positive IgG results do not consistently correlate with symptoms. For assessing gut health, validated methods like breath tests (lactose, fructose), stool markers (calprotectin), or physician-supervised elimination diets are more reliable. These tests are best classified as marketing tools – they imply a precision they lack. Consumers should be cautious and consult a doctor before making dietary changes based on such results.