How are Östradiol and Allergie related?

The relationship between estradiol and allergies is complex and debated in research. Estradiol, the primary female sex hormone, can influence the immune system in multiple ways: it modulates T‑helper cell, B‑cell, and mast cell activity, which can have both pro‑ and anti‑inflammatory effects. Some studies suggest that higher estradiol levels – for example during the late follicular phase of the menstrual cycle or with hormone replacement therapy – may be associated with enhanced allergic responses (e.g., histamine release) and increased symptoms of asthma or hay fever. Other research indicates protective effects, particularly for certain allergy types. Individual genetic predisposition, timing of hormone exposure, and the specific allergy type are critical factors. Importantly, the provided context does not contain direct study data or validated biomarkers for clinical use. Therefore, the evidence is rated as 'mixed' or 'unclear'. Measuring estradiol alone without medical evaluation and allergy testing is not useful. If a hormone‑influenced allergy is suspected, a specialist (allergology, gynecology/endocrinology) should be consulted.