Evidence check: Selen in the context of Müdigkeit

The provided context does not contain any information about selenium in relation to fatigue. There is no direct evidence from the given sources to assess the role of selenium on tiredness. Generally, selenium is an essential trace element involved in antioxidant defense and thyroid function; a deficiency might theoretically contribute to fatigue, but this is not addressed in the documents. The evidence is therefore unclear. Consumers should not rely on single nutrient tests or DNA markers and should consult a physician for persistent fatigue.