Contains antioxidant properties that help fight free radicals in the body Free radicals can cause oxidative stress which may damage cells. As an antioxidant, it helps fight free radicals in your body. , , Free radicals are unstable and reactive compounds that can be produced naturally, or as a result of external factors like air pollutants and smoking. Free radicals cause a disruptive chain reaction that ultimately disturbs the normal operations of a cell. As an antioxidant, Selenium helps neutralize free radicals.** It also helps recycle Vitamin E for additional antioxidant support.