Coenzyme Q10 is an essential cofactor of enzymes involved in the energy production process. Coenzyme Q10 is stored in mitochondria, structures found within cells responsible for the generation of energy (in the form of a molecule called ATP). Coenzyme Q10 levels decrease with age, and are depleted by intense physical exercise or illness. Coenzyme Q10 levels are also depleted in patients prescribed cholesterol-lowering statin drugs. Coenzyme Q10 promotes healthy cardiovascular function, and healthy immune function.Coenzyme Q10 is also important within the body as a major fat-soluble antioxidant, protecting cell membranes from the damaging effects of free radicals,