was tun bei einer allergischen reaktion — can a DNA test help?

For an acute allergic reaction, immediate medical care is paramount – a DNA test cannot help in that moment. DNA tests like those from MyBody-X analyze genetic predispositions for intolerances or allergies, but not the acute immune response. The evidence for such tests is weak: IgE tests (true allergies) are clinically accepted, while IgG tests for food sensitivities lack validation. MyBody-X offers allergy tests but does not clearly distinguish between IgE and IgG. A genetic test might provide long-term insights into predispositions (e.g., lactose intolerance via LCT gene), but for acute reactions it is irrelevant. Moreover, effect sizes of many gene variants are small. In a real allergic emergency (anaphylaxis), only epinephrine and medical help count. A DNA test never replaces an allergist's diagnosis. Therefore: DNA test cannot help with acute reaction, at best it may complement root cause analysis – with caution.