Selenium is an essential trace element which activates one of the most important antioxidant enzymes in the body, protecting tissue cells from oxidative damage caused by free radicals. It is also essential for healthy immune functioning. HealthAid's strong Selenium formulation contains Selenium in its natural form, which is best absorbed and utilised in the body; it is also fortified with Vitamin E to make this a powerful antioxidant supplement in a balanced easy-to swallow, one-a-day capsule.