Coenzyme Q10 is a compound made by your body and stored in the mitochondria of your cells .The mitochondria are in charge of producing energy. They also protect cells from oxidative damage and disease-causing bacteria or viruses.One of its primary functions is to help generate energy in your cells. It’s involved in making adenosine triphosphate (ATP), which is involved in energy transfer within cells Its other crucial role is to serve as an antioxidant and protect cells from oxidative damage.