Evidence check: Selen in the context of allergy

The provided context does not contain specific information on selenium and allergy. Generally, selenium is an essential trace element with antioxidant properties that influences immune function. Some observational studies suggest a possible link between low selenium status and increased allergy risk, but results are inconsistent. Randomized controlled trials are lacking, so supplementation for allergy prevention or treatment is not evidence-based. Additionally, excessive selenium intake can be toxic (selenosis). If deficiency or allergy is suspected, medical advice should be sought.