What should I know about lebensmittelunvertraglichkeitstest?

Food intolerance tests (e.g., IgG blood tests, DNA tests) are often marketed as a simple solution for digestive issues. However, the scientific evidence is mixed: while standardized breath or provocation tests exist for a few intolerances (lactose, fructose, histamine), many commercial IgG tests lack proof of clinical relevance. The German Society for Allergology and Clinical Immunology (DGAKI) advises against IgG-based tests, as elevated IgG levels often reflect a normal immune response and do not indicate intolerance. DNA tests for food intolerances also typically have small effect sizes and cannot replace medical diagnostics (e.g., elimination diet, IgE testing for allergies). Caution is warranted: misinterpretation can lead to unnecessary diets or malnutrition. For persistent symptoms, consult a doctor or dietitian.