Myths vs facts: CYP2D6 and Allergie

CYP2D6 is a cytochrome P450 enzyme primarily involved in drug metabolism, not directly in allergic reactions. A common myth claims that certain CYP2D6 variants cause or worsen allergies. In reality, only weak mechanistic evidence suggests CYP2D6 polymorphisms might influence histamine sensitivity or antihistamine response. The effect is small and not clinically actionable. A consumer DNA test for CYP2D6 cannot predict allergy risk. For genuine allergy symptoms, established diagnostics (skin prick test, specific IgE) and medical evaluation are essential. MyBody-X tests do not include CYP2D6 as an allergy marker. Marketing claims linking CYP2D6 to allergies are misleading. Fact: CYP2D6 is not an allergy gene. The real genetic contributors to allergies involve genes like IL4, IL13, FCER1A, and HLA regions, which are analyzed in validated tests.