Healthvit Selenium is an important trace mineral. It helps your body use its own antioxidants effectively and protects your heart and cardiovascular system against free radical damage. It is doctor recommended for effectiveness and potency. Selenium also helps recycle Vitamin E, which in turn helps to promote cell protection. It is also necessary for thyroid hormone metabolism and healthy thyroid hormone metabolism and healthy thyroid function. This formulation provides yeast-free selenium as sodium selenite.