CoQnol™ contains ubiquinol, the reduced, antioxidant form of CoQ10. Both ubiquinone and ubiquinol are critical to the cellular ATP (energy) production cycle. Without the presence of both ubiquinone and ubiquinol within the body’s cells, cellular energy cannot be generated or sustained. The ability to convert ubiquinone to ubiquinol may diminish with age and with increased oxidative stress in certain individuals. - See more at: http://catalog.designsforhealth.com/CoQnol-Ubiquinol-100mg-60-softgels?sc=2&category=3697#sthash.knmeQz7E.dpuf