Coenzyme Q10, on the other hand, is a naturally occurring antioxidant present in the body's cells, with particularly high concentrations in the heart, liver, and kidneys. It plays a pivotal role in the electron transport chain, a series of reactions that generate ATP (adenosine triphosphate), the primary energy carrier in cells. CoQ10 also acts as a powerful antioxidant, protecting cells from oxidative damage and supporting cardiovascular health.