PQQ is a redox cofactor and a powerful antioxidant found in various foods, including fermented soybeans, spinach, and green pepper. It plays a critical role in cellular metabolism and energy production by supporting mitochondrial function. Mitochondria, often referred to as the powerhouses of the cell, are responsible for generating adenosine triphosphate (ATP), the primary energy currency in our body. PQQ enhances mitochondrial biogenesis, meaning it encourages the production of new mitochondria, which is crucial for improving cellular energy and function.