PQQ is a redox cofactor that plays a crucial role in cellular energy metabolism. It is known to promote mitochondrial function, which is essential for energy production in our cells. As we age, mitochondrial efficiency tends to decline, which can lead to a variety of health issues including fatigue, cognitive decline, and decreased physical performance. PQQ acts as a powerful antioxidant, helping to neutralize harmful free radicals in the body. This not only helps protect our cells from damage but also supports overall cellular health.