Selenium is an essential mineral found in small amounts in the body. It works as a natural antioxidant. Antioxidants can neutralise free radicals and may reduce or even help prevent some of the damage they cause. Free radicals can damage cell membranes and DNA. Free radicals may contribute to ageing and a number of conditions including heart disease and cancer. Selenium helps the body function at its optimum level while also increasing the effectiveness of other antioxidants. Solgar Selenium may help to support male fertility, liver function, immune function and hearth health.