How are IgG Unverträglichkeitstest and Müdigkeit related?

The claim that IgG food intolerance tests are directly linked to fatigue lacks robust scientific evidence. Commercial providers often market IgG antibodies as markers of 'delayed food intolerance' supposedly causing symptoms like tiredness, headaches, or bloating. However, major medical organizations – including the European Academy of Allergy and Clinical Immunology (EAACI) and the German Society for Allergology and Clinical Immunology (DGAKI) – explicitly advise against using IgG tests for diagnosing food intolerances. The detected IgG levels frequently represent a normal physiological response to dietary proteins and do not indicate pathology. Fatigue is a non‑specific symptom with numerous potential causes: sleep disorders, iron deficiency, thyroid dysfunction, stress, or chronic diseases. Relying on an unvalidated IgG test may lead to unnecessary dietary restrictions and anxiety without addressing the root cause. Current evidence for a causal link between IgG test results and fatigue is weak, based largely on anecdotal reports rather than controlled clinical trials. Consumers should be cautious: these tests are not recommended by evidence‑based guidelines. If you experience persistent fatigue, consult a healthcare professional for a thorough evaluation rather than self‑diagnosing with a commercial IgG test.