CoQ10 is a naturally occurring antioxidant found in every cell of the body, primarily in the mitochondria, where it plays a critical role in the production of adenosine triphosphate (ATP), the energy currency of the cell. As we age, the levels of CoQ10 tend to decline, which can lead to decreased energy production and an increased risk of various health issues. Supplementing with CoQ10 has been associated with improved energy levels, enhanced athletic performance, and potential benefits for heart health.