Selenium is an essential trace mineral that supports the immune system Selenium is an antioxidant that protects vitamin E from degradation. It helps to build the immune system by destroying free radicals, & aid in the production of antibodies. Selenium is absorbed through the intestines & stored in the liver, kidneys, & muscles. The lower the selenium intake the higher the incidents of cancer. Selenium fortifies heart energy cells, making sure they get enough oxygen. Selenium helps eliminate arsenic. Helpful in stroke prevention. Helps protect against the effects from arsenic, cadmium & mercury. Component of glutathione peroxidase, protecting tissues from the effects of polyunsaturated fatty acid oxidation.