Myths vs facts: Selen and Allergie

Selenium is an essential trace element with antioxidant properties that modulates immune function. Myth: Selenium deficiency causes allergies. Fact: Observational studies suggest an association between low selenium status and higher allergy prevalence, but causality is unproven. Randomized controlled trials (RCTs) show no consistent benefit of selenium supplementation for preventing or treating allergies. Myth: Selenium supplements cure allergies. Fact: Evidence is weak and mixed. High doses can cause selenosis (toxicity). Allergies are multifactorial (genetics, environment, diet). Blood selenium tests or DNA analysis (e.g., SELENOP variants) may identify deficiency but do not replace clinical allergy evaluation. Be cautious of marketing claims: selenium is not a magic bullet. Evidence grade: human-moderate (observational, few RCTs).