Selenium belongs to the group of minerals and is an essential trace element. This means that on the one hand it is vital and on the other hand it is only needed in the wake of the body. However, this small amount must be ingested regularly through food, as the body itself cannot produce selenium. Even though the human body only needs small amounts of selenium, selenium is still indispensable as an essential trace element. In fact, selenium takes on numerous tasks in the body. For example, selenium is important for cellular and energy metabolism and therefore also contributes to the maintenance of normal hair and nails. In addition, selenium also contributes to the normal functioning of the thyroid gland, normal spermatogenesis in men, and the normal functioning of the immune system. Due to its high reactivity with oxygen in animals and humans, it also plays an important role in protecting cell membranes from oxidative stress. 1 tablet of 500 mg once a day with plenty of liquid is recommended Recommended daily intake should not be exceeded. Food supplements should not be used as a substitute for a balanced and varied diet or a healthy lifestyle. Keep out of reach of small children.