Is IgG useful for Müdigkeit?

IgG testing for food sensitivities is often marketed as a tool to identify dietary triggers for non-specific symptoms like fatigue. However, the scientific evidence does not support its clinical utility. IgG antibodies are a normal part of the immune response to food proteins and do not reliably indicate intolerance or allergy. Multiple studies have shown that IgG test results are poorly reproducible and correlate poorly with symptoms. Major allergy and immunology organizations, including the EAACI and the American Academy of Allergy, Asthma & Immunology, recommend against using IgG tests for diagnosing food sensitivities. Fatigue is a complex symptom with numerous potential causes—sleep disorders, nutritional deficiencies, hormonal imbalances, chronic infections, or psychological factors. Relying on an unvalidated IgG test may delay proper diagnosis and appropriate treatment. If you experience persistent fatigue, consult a healthcare professional for a thorough evaluation. In summary, IgG testing for fatigue lacks robust evidence and is best considered a marketing claim rather than a clinically useful tool.