Coq10 100 mg, Coenzyme Q10, 150 Softgels, NOW FoodsNOW Foods CoQ10 100 mg Cardiovascular Health. Cellular Energy Production. Free Radical Scavenger. 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 functions as a potent free radical scavenger in cell membranes, as well as within blood vessels.