Myths vs facts: STI Test and Blutzucker

The claim that IgG antibody tests reliably detect food intolerances is not scientifically valid. IgG antibodies indicate immune exposure, not an adverse reaction. For true allergies, IgE is the relevant marker. Professional guidelines, including those from the European Academy of Allergy and Clinical Immunology (EAACI), advise against IgG-based testing due to lack of clinical validity. Such tests are often marketed in a 'MyBody-X' style without evidence-based diagnostic support. Results can lead to unnecessary dietary restrictions and anxiety. Caveat: Never replace a doctor's diagnosis with a mail-order test. For suspected food intolerance, controlled elimination and challenge tests or breath tests (e.g., for lactose intolerance) remain the gold standard. The evidence for IgG panels is best classified as 'marketing', not clinically substantiated.