Coenzyme Q10 is a naturally occurring substance found in all cells of the human body as well as in animals and many plants. It has many vital roles in cells and without it human life would not be possible. Coenzyme Q10 is a fat soluble antioxidant, combating the attack of oxygen free radicals which can damage many components of the cell. Coenzyme Q10 is an integral part of the mitochondrial respiratory chain which produces energy in the cell. Coenzyme Q10 has an important role in regulating genes which in turn control energy production and other important functions in the cell. It is found in highest concentration in those organs and tissues with highest oxygen consumption such as the heart, brain and muscle.