Coenzyme Q10 (CoQ10) is a vitamin-like compound that plays a central role in cellular energy production. CoQ10 is found throughout the body, but is especially concentrated in the heart, liver, and kidney and production has been found to decline with age. CoQ10 works with vitamin E as a potent free radical scavenger in cell membranes, as well as within blood vessels. Years of scientific research have shown that CoQ10 helps to maintain a healthy heart and vascular system. NOW uses only the natural, all-trans form of CoQ10.