Coenzyme Q10, also known as CoQ10, is a compound that occurs naturally within the human body. It is most abundant in organs with high energy needs, such as the heart, liver, kidneys, and pancreas. In the United States, CoQ10 is available as a dietary supplement. Due to its essential role in bodily functions and the fact that individuals with certain medical conditions often show lower levels of CoQ10, scientists have explored whether supplementing it could provide health benefits. Bottom Line •