Evidence check: Ferritin in the context of Allergie

Ferritin is an iron storage protein commonly used to assess iron status. In the context of allergies, some evidence suggests that iron deficiency or excess may modulate immune responses, such as mast cell activity or IgE production. However, the evidence is moderate: observational studies report associations between low ferritin and increased allergy risk, while others find no link. Ferritin is not a validated allergy biomarker; elevated levels can also reflect inflammation or infection. Routine ferritin testing for allergy patients is not currently recommended. Interpretation should consider full iron panel (transferrin, hemoglobin) and clinical presentation. Caution is advised against self-supplementation with iron without medical guidance, as excess iron may promote oxidative stress. In summary, ferritin offers only supportive clues, not a diagnosis. Evidence: human-observational, not RCT-based.