On the other hand, PQQ is a lesser-known but equally important compound. It is a redox cofactor that has been shown to promote the growth of new mitochondria, a process known as mitochondrial biogenesis. Like CoQ10, PQQ exhibits strong antioxidant properties, protecting cells from oxidative stress and damage caused by free radicals. Moreover, PQQ has been linked to cognitive function and neuroprotection, making it an intriguing supplement for brain health.