Selenium is a micromineral that functions in concert with vitamin E and is essential to good health. It helps detox cell-scavenging free radicals as well as heavy metals like arsenic, cadmium, mercury and silver. Some researchers also now believe that selenium reduces the risk of certain cancers. Selenium may even slow the progress of aids. Selenium functions as a key to support the immune system, supports stronger hearts, healthier pancreatic function, and greater skin and muscle tone.