Is IgE Allergietest useful for longevity?

The question of whether an IgE allergy test is useful for longevity cannot be clearly answered with current evidence. IgE tests are primarily used to diagnose acute type I allergies (e.g., hay fever, asthma, food allergies) and are well-established in allergology. However, for longevity or anti-aging purposes, there is no robust evidence showing a direct benefit. While chronic inflammation is linked to aging, and undiagnosed allergies might contribute to inflammatory load, IgE levels alone are not a validated biomarker for lifespan extension. The evidence is mostly mechanistic or associative, lacking interventional trials. Furthermore, IgE tests have high false-positive rates and require clinical context. For longevity, more established markers include inflammatory cytokines (CRP, IL-6), metabolic parameters, and genetic risk scores. An IgE test may be useful if allergy symptoms are present, but it is not recommended as a general longevity screening tool. Marketing such tests for anti-aging purposes is not supported by science.