PQQ is a redox cofactor, found in various foods such as kiwifruit, green peppers, and fermented soybeans. It serves as a potent antioxidant, protecting cells from oxidative stress—a leading cause of cellular damage and aging. One of PQQ’s most remarkable functions is its ability to stimulate the growth of new mitochondria, the powerhouses of our cells. This process, known as mitochondrial biogenesis, can lead to enhanced energy metabolism, improved cognitive function, and increased resilience against cellular aging.