What role does Selen play in Müdigkeit?

The provided context does not contain specific information about selenium's role in fatigue. Selenium is an essential trace element that functions as a component of selenoproteins (e.g., glutathione peroxidases) with antioxidant activity and supports thyroid hormone metabolism. Selenium deficiency can indirectly contribute to fatigue through reduced antioxidant capacity or impaired thyroid function. However, evidence for a direct causal link between selenium status and fatigue in the general population is weak, relying mostly on observational studies or mechanistic reasoning. In adequately nourished individuals, selenium supplementation does not provide proven benefit against fatigue and may be toxic in excess. Consumer lab tests measuring selenium offer only a snapshot; interpretation requires clinical context. Without specific data from the given material, the evidence remains unclear.