SOLGAR Selenium 100µg Food supplement 100 tablets Net weight 3.5g In the form of highly assimilable L-selenomethionine. Selenium , with symbol Se, is an essential trace element for the human organism . It is found in some foods (Brazil nuts, whole grains, meat and eggs, fish and seafood). Selenium is known for its protective action against free radicals , it is essential for the preservation of the organism and contributes to the strengthening of the immune system and the thyroid. In case of thyroid problems, also think about iodine! Solgar Vitamin and Herb HP23 5PT (UK)