Berberine and MicroPQQ® from Dr. Mercola is a unique blend of pyrroloquinoline quinone (PQQ) and berberine, two nutrients that work together to support and protect mitochondrial function. Berberine promotes lipid and glucose metabolism, making it a great addition to a ketogenic diet. MicroPQQ is more than twice as absorbable as regular PQQ for optimum cognitive function.