Myths vs facts: AllergieCheck | IgE-Antikörper Test and fatigue

The AllergieCheck (IgE antibody test) measures specific IgE against allergens and is a well-established tool for diagnosing type I allergies (e.g., hay fever, asthma). However, it cannot 'diagnose' fatigue. Fatigue is a non-specific symptom caused by many factors – sleep deprivation, stress, thyroid issues, iron deficiency, or chronic inflammation. A positive IgE test does not automatically mean allergies explain the fatigue. Allergies can indirectly contribute to fatigue (e.g., disturbed sleep due to nocturnal asthma or allergic rhinitis), but the causal link is often weak. Many people with elevated IgE are asymptomatic. The test is not a screening for 'allergic exhaustion' – a marketing concept without medical basis. Evidence: human-strong for allergy diagnosis, but practice/mixed for fatigue as an endpoint. Caveat: Do not self-treat with antihistamines or elimination diets without medical evaluation.