Coenzyme Q10 (CoQ10) is a vitamin-like compound that plays a central role in cellular energy production. concentrated in the heart, liver, and kidney and production have 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 cardiovascular system and normal nervous system function.