Pyrroloquinoline quinone (PQQ) is a compound that has garnered significant attention for its role as a redox cofactor in cellular processes. PQQ is known for its antioxidant properties, which help protect cells from oxidative stress—a major contributor to aging and various diseases. Moreover, PQQ is believed to promote mitochondrial biogenesis, encouraging the production of new mitochondria, which are essential for energy production in cells. By enhancing mitochondrial function, PQQ may support improved energy levels and cognitive function.