Evidence check: IgE in the context of Allergie

The query concerns IgE in the context of allergies. The provided context documents contain no specific information on IgE testing. They only address IgG-based food tests, which are not recommended by medical guidelines. IgE (Immunoglobulin E) is the key antibody in type I (immediate) allergies. Specific IgE tests for individual allergens (e.g., pollen, pet dander, foods) are clinically established and can confirm allergy when correlated with symptoms. However, a positive IgE result alone is not diagnostic – many individuals have elevated IgE without clinical allergy. Total IgE is non-specific and not recommended for diagnosis. Direct-to-consumer tests offering IgE without medical supervision risk misinterpretation and unnecessary dietary restrictions. The evidence for specific IgE is human-strong, but interpretation requires expertise. Without context from the provided documents, the answer must remain conservative: IgE tests are useful but only within a physician-led allergy workup. Evidence is therefore rated as 'mixed' because the available sources do not directly support the query.