CoQ10, or ubiquinol, is an essential coenzyme. Your body needs it for several reasons; it can promote cellular energy production, as cells produce energy through the respiration process that provides their mitochondria with oxygen. The electron transport chain requires CoQ10 to produce adenosine triphosphate (ATP), which is a molecule rich in energy that provides support to all of the cells in the body. ATP is vital to the immune system, heart muscles and periodontal tissue in the gums; these tissues need large amounts of energy to function properly. CoQ10 works to support cardiovascular health by providing nutritional support. It promotes healthy functioning of the heart muscle itself and supports healthy blood flow, metabolism of lipids and vitamin E levels. It can also serve as an antioxidant, which strives to protect your cells from free radicals that can potentially cause damage.