Selenium is an antioxidant that protects vitamin E from degradation. It helps to build the immune system by destroying free radicals, and aid in the production of antibodies. Selenium is absorbed through the intestines and stored in the liver, kidney's, and 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. This product is suitable for vegetarians.