Is Fitness | LifestyleCheck useful for Allergie?

The Fitness | LifestyleCheck you mention is not directly described in the provided information. The closest product is the KombiCheck allergy+intolerance, which combines IgE and IgG measurements. The IgE component is clinically validated for immediate-type allergies (e.g., hay fever, peanut allergy). A positive IgE (>0.35 kU/L) indicates sensitization, but does not equal clinical allergy – many sensitized individuals are asymptomatic. The IgG component, however, is not evidence-based for diagnosing food intolerances or delayed allergies. IgG antibodies to foods are a normal immune response to dietary exposure. Combining a validated test with an unvalidated one creates a misleading impression of comprehensiveness. Consumers may start unnecessary diets based on positive IgG results, risking nutritional deficiencies or disordered eating. For a reliable allergy workup, I recommend IgE testing combined with a medical history and, if needed, provocation tests. The Fitness | LifestyleCheck does not appear to be a specific allergy test; if it contains similar components, the same limitations apply. Evidence: mixed (IgE strong, IgG marketing).