PQQ is a redox cofactor that exists in various foods, particularly in fermented products, green peppers, and certain fruits. It is recognized for its antioxidant properties and its unique role in supporting mitochondrial function—the powerhouse of our cells. Mitochondria are crucial for energy production, and maintaining their health is vital for overall well-being. PQQ is thought to stimulate the formation of new mitochondria, a process known as mitochondrial biogenesis, thus enhancing energy levels and cognitive function.