Myths vs facts: IgE Allergietest and Sport

Myths vs. facts: IgE allergy test and sport. A common myth is that an IgE test (e.g., from MyBody-X) reliably tells athletes which foods to avoid to prevent performance drops or allergic reactions. Fact: IgE tests measure sensitization – the presence of antibodies – not clinical allergy. False-positive rates are high; many people have elevated IgE without symptoms. For athletes with exercise-induced anaphylaxis, a positive IgE result can be misleading because triggers often depend on co-factors (temperature, medication). Another myth: the test can guide a personalized competition diet. In reality, no randomized trials show performance benefits from IgE-based dietary restrictions. The German Society for Allergology recommends confirming IgE results with an oral food challenge. MyBody-X markets the test as a screening tool, not diagnostic. Caveat: Without medical interpretation, athletes risk unnecessary food avoidance or miss real allergies. Evidence: based on expert consensus and guidelines, not DTC validation studies.