Highlights Ubiquinol is the reduced, active antioxidant form of Coenzyme Q10 produced naturally within the body Ubiquinol is CoQ10 that has been converted for use in the cellular energy production process. Ubiquinol is a critical component of energy production for every cell of the human body. With age, the ability of the body to produce CoQ10 declines. Additionally, the ability of the body to reduce or convert CoQ10 to Ubiquinol is diminished with age or oxidative stress. Supplementing with Ubiquinol is especially important to provide effective antioxidant protection and to maintain optimum Ubiquinol levels.