CanPrev Selenium Glycinate 200 120 Veggie CapsSource of antioxidants to help protect against oxidative stress Plays a big role in reproduction and DNA synthesis Important role in prostate health, helping to maintain healthy levels of Prostate Specific Antigen (PSA) Selenium is a trace mineral that is a key player in several functions your body performs daily. The greatest concentrations are found in the thyroid gland. Selenium is a component of the enzyme that helps convert T4 to T3, producing