Coenzyme Q-10 (Co Q-10) is a naturally occurring, fat soluble antioxidant that has a big job: supporting you as you age gracefully. Free radicals can cause oxidative stress which may damage cells. which is what makes Co Q-10 an important compound in your body. It is essential to the production of energy by almost every cell and functions as an antioxidant to fight free radicals. By supporting the normal physiological function of the heart. Co Q-10 contributes to cardiovascular wellness and energy production within your heart.