AmericanCoenzyme Q10 (also known as CoQ10), also known as ubiquinone, is a fat soluble quinone compound existing in nature. Its structure is similar to vitamin K, vitamin E and plastoquinone. AmericanCoenzyme Q10 is a complex natural antioxidant found in heart, liver, kidney, and pancreatic cells, responsible for producing energy. It can participate in energy production and activation in human body cells, and is the most effective antioxidant to prevent arteriosclerosis