Selenium is one of the most important minerals in a healthy diet
, and it has been studied for its ability to prevent cell damage. Scientists see this ability to protect cells from damage as possibly important in the prevention of cancer, and selenium is being studied for possible cancer preventative properties. It is important to get the selenium you need from your diet, since large doses of selenium supplements can be toxic. Fortunately, selenium is easily found in a healthy diet. Good sources of dietary selenium include fish and shellfish, red meat, whole grains, poultry and eggs, and garlic. Vegetables grown in selenium rich soils are also good sources of dietary selenium.