Note BBE: 10/2014 Selenium is a naturally occurring trace mineral that is known for it’s powerful antioxidant properties, it has also been known to help develop tanned skin. Essential Selenium provides 200mcg of this free radical fighting mineral that has long been associated with a healthy immune system. Found naturally in soil, Selenium is needed for our bodies to create a compound called glutathione peroxidase, which is used by our bodies as an antioxidant. This makes selenium essential for a healthy immune system and may help us fight a variety of diseases and even protect cells from aging and natural degeneration. Our one a day tablet is a great way of advancing the fight against free radical damage.