Doctor s Best PQQ with BioPQQ provides pyrroloquinoline quinone (PQQ). PQQ is a polyphenol with antioxidant properties that s important for energy production and supports nerve cells and cognitive functions.* PQQ also stimulates the growth of new mitochondria even in aging cells. Mitochondria are the cell?s power producers generating about 90% of the energy for physical and mental functions.* At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!