CoEnzyme Q10 (CoQ10) is a valuable, naturally occurring free radical fighter necessary for healthy energy production in every cell of the body. CoEnzyme Q10 is a component of every living cell. As body levels of CoEnzyme Q10 drop, so does the general status of health. Low levels can result in high blood pressure, heart attack, angina, immune system depression, periodontal disease, lack of energy and obesity.