Ubiquinone, also known as coenzyme Q10, is a naturally occurring antioxidant found in the cells of the body. It plays a crucial role in the production of energy within the mitochondria, the powerhouses of cells. Ubiquinone helps convert nutrients from food into adenosine triphosphate (ATP), which is essential for cellular functions. As we age, the levels of ubiquinone in the body can decrease, potentially impacting energy levels and overall health. Some people take ubiquinone supplements to support heart health and improve energy, although more research is needed to fully understand its benefits and effectiveness.