PQQ, on the other hand, is a lesser-known compound, but its health benefits are equally impressive. It is a potent antioxidant that protects against cellular oxidative stress and is believed to support brain health and cognitive function. Preliminary studies have suggested that PQQ may enhance energy metabolism in the mitochondria, potentially leading to improved physical and mental performance. Moreover, PQQ is known for its role in promoting the growth of new mitochondria, which may result in increased cellular energy production over time.