Ubiquinol is the reduced form of the vital compound CoQ10 and accounts for 80% of the CoQ10 found naturally in the human body. It protects cells from oxidative stress, while sparing and recycling other antioxidants such as vitamins C and E. Studies suggest that ubiquinol (reduced) is better absorbed than ubiquinone (oxidized). This data supports the hypothesis that ubiquinol may have a higher bioavailability, which means it could potentially be effective at a lower dose when compared to ubiquinone. It is believed that ubiquinol provides all the benefits attributed to conventional CoQ10, including the optimization of energy levels as well as heart, lung, and kidney health.