What should I know about lebensmittel selen?

Selenium is an essential trace element critical for thyroid hormone metabolism, antioxidant defense (via glutathione peroxidases), and immune function. The recommended dietary allowance for adults is about 55 µg per day, with an upper tolerable limit of 400 µg/day to avoid selenosis (symptoms include garlic breath, hair loss, and nail brittleness). Rich dietary sources include Brazil nuts (just 1–2 nuts can meet daily needs), seafood, organ meats, eggs, and mushrooms. However, selenium content in plant foods varies greatly by soil selenium levels; European soils are often low, so supplementation may be considered in some cases, but only after testing. The provided context does not contain specific information on selenium; this answer is based on established nutritional and toxicological knowledge. Consumers should be cautious with high-selenium foods like Brazil nuts and avoid excessive supplementation. A serum selenium test can help assess status, but results should be interpreted by a healthcare professional. Overall, a balanced diet with moderate intake of selenium-rich foods is recommended.