What role does Ferritin play in Allergie?

Ferritin is primarily an iron storage protein and not a direct biomarker for allergies. Its role in allergic conditions is indirect, mediated through iron metabolism and immune regulation. Iron deficiency (low ferritin) can impair immune cell function, including T‑helper cells and mast cells, potentially altering allergic responsiveness. Conversely, ferritin is an acute‑phase reactant that rises during systemic inflammation, including severe allergic reactions. Evidence from observational studies is mixed: some report elevated ferritin in allergic rhinitis or asthma, others find no association or even lower levels in atopic dermatitis. Overall, the evidence is moderate and not sufficient to recommend ferritin as a diagnostic or monitoring tool for allergies. Importantly, ferritin alone cannot distinguish allergic inflammation from other causes. Consumer tests marketing ferritin as an 'allergy marker' lack clinical validation. If iron status is a concern, ferritin should be interpreted alongside transferrin saturation and soluble transferrin receptor. Safety note: both iron deficiency and overload can have health consequences; supplementation should only follow proper diagnostic workup.