what is selenium supplements used for
Descriptions. Selenium supplements are used to prevent or treat selenium deficiency. The body needs selenium for normal growth and health. Selenium is needed for certain enzymes that help with normal body functions.Although selenium is being used to prevent certain types of cancer, there is not enough information to show that this is effective.f you think that you are not getting enough vitamins and/or minerals in your diet, you may choose to take a dietary supplement. Selenium is found in seafood, liver, lean red meat, and grains grown in soil that is rich in selenium.