Myths vs facts: Eisen-Ferritin Selbsttest and allergy

The iron-ferritin self-test measures iron storage (ferritin) in the blood, not allergies. A common myth is that low ferritin causes or worsens allergies. In reality, there is no robust evidence that iron deficiency triggers allergies. Allergies are immune-mediated reactions to allergens, while ferritin reflects iron status. Another myth: high ferritin protects against allergies – also unsubstantiated. Fact: The test can detect iron deficiency or overload, which may be relevant for fatigue or inflammatory conditions. However, ferritin is an acute-phase reactant; it can be falsely elevated during infections or inflammation. The test does not replace medical allergy diagnostics (e.g., IgE tests, skin prick tests). Evidence for its utility in allergies is weak – it is a general blood marker, not an allergy marker. Anyone with allergy symptoms should see a doctor rather than rely on self-tests. The self-test provides only a snapshot and is subject to lab variability. ISO certification of the lab ensures process quality, not clinical validity for allergies.