Coenzyme Q10 (CoQ10) is a naturally occurring compound found in the cells of the human body and in various foods. It plays a crucial role in the production of energy within the mitochondria, which are the powerhouses of cells responsible for generating adenosine triphosphate (ATP), the primary energy currency of the cell. While the body can produce CoQ10 on its own, its levels may decrease with age or due to certain medical conditions.