One of the most compelling aspects of PQQ is its role as an antioxidant. Antioxidants are substances that neutralize harmful free radicals in the body, which can lead to oxidative stress and various chronic diseases, including cancer, heart disease, and neurodegenerative disorders. PQQ has been shown to be highly effective at scavenging free radicals and protecting cells from oxidative damage. This protective mechanism is crucial for maintaining the integrity of cellular functions and overall health.