Also known as:CoQ10, Total Coenzyme Q10, Ubiquinone 50.

Coenzyme Q10 (CoQ10) is a fat-soluble, vitamin-like substance in all human cells.  It aids in biochemical reactions that produce energy in cells.  CoQ10 also acts as an antioxidant and is naturally present in a variety of foods such as heart, liver and kidney as well as in beef, soybean oil, sardines, mackerel and peanuts. In some people with cardiac failure due to different causes, less CoQ10 has been observed, especially in patients with congestive heart failure. Some studies have shown positive results and others haven't. These studies, with one exception, have been done with small numbers of patients for relatively short periods. It is important to note that in these studies, CoQ10 was given in addition to traditional drug treatments, which makes it hard to know which treatment was the effective one.