This one merits a longer background so read on... Glutathione has several important purposes. It supports liver health and cellular functioning, and its antioxidant properties may work to protect you from potentially harmful free radicals. When you're under high levels of oxidative stress or exposure to toxins‚ the amount of glutathione present in your body to recycle other antioxidants (such as vitamin E) declines dramatically. As a result‚ your immune system may be weakened. Additionally, higher levels of glutathione may maximize your athletic performance by encouraging muscle growth and strength‚ shortening recovery time‚ and boosting physical endurance.