What should I know about lebensmittelunvertraglichkeit testen lassen?

Food intolerance tests (e.g., IgG blood tests or DNA tests) are often marketed as simple solutions, but the scientific evidence is weak. IgG tests merely reflect immune exposure, not intolerance, and frequently yield false positives, leading to unnecessary dietary restrictions. DNA tests for variants like MTHFR (rs1801133) or NRF2 (rs6721961) lack clinical validation for food intolerances; they may offer mechanistic hints but cannot diagnose a condition. Microbiome tests for lactose intolerance are also not well-supported—the lactose breath test remains the gold standard. Beware of tests claiming to detect 'all intolerances': evidence-based medicine relies on symptom diaries, elimination diets, and controlled provocation tests. Consult a doctor or registered dietitian before making dietary changes based on such tests. Evidence: human-moderate (IgG tests weak, genetic tests mechanistic).