Coenzyme Q10, also called ubiquinone, is present in almost all cells, where it is necessary for mitochondrial energy production. The bodys highest concentrations of Coenzyme Q10 (CoQ10) are found in the heart, where constant chemical energy availability is imperative. In addition to its benefits for cardiac function through energy production, CoQ10 also functions as a powerful fat soluble antioxidant, providing protection against free radical attack for vascular structures, as well as for other tissues.