What role does IgG Unverträglichkeitstest play in Stress?

IgG food intolerance tests are frequently marketed for stress-related symptoms like bloating, fatigue, or brain fog. However, the scientific evidence does not support their use for diagnosing stress or food intolerances. IgG antibodies to foods are a normal part of immune memory and do not reliably indicate adverse reactions. Major medical societies (e.g., EAACI, AAAAI) advise against these tests due to lack of validation, high false-positive rates, and risk of unnecessary dietary restrictions. Stress can indeed modulate gut permeability and immune responses, but an IgG test cannot differentiate between physiological exposure and pathological intolerance. For stress-related gastrointestinal complaints, evidence-based strategies include stress reduction techniques, dietary adjustments guided by a professional, and targeted medical tests (e.g., lactose hydrogen breath test, celiac serology). Relying on an IgG test may delay proper diagnosis and increase anxiety. Therefore, its role in stress management is not supported by current evidence.