CoQ10 is a vitamin-like nutrient that plays a vital role in the energy production in every cell in our body. Our body naturally produces CoQ10 and converts ubiquinone to ubiquinol. However, our body's ability to produce CoQ10 and convert it into ubiquinol significantly decreases as we age. Ubiquinone CoQ10 is the active form of CoQ10 - approximately 95% of the CoQ10 circulating in our body is in the form of ubiquinol. As we age, our body's ability to produce ubiquinone and convert it into its active form of ubiquinol diminishes significantly. Advanced ubiquinol is both water and fat soluble, unlike regular unsolubilized ubiquinone that dissolves in fats only and to a very limited degree.