PQQ (Pyrroloquinoline Quinone), also known as methoxatin acts as a cofactor, or enzyme booster in the process of oxidation reduction (REDOX). PQQ's primary benefit is its ability to promote our mitochondria's ability to provide our cells with energy (ATP) and support our cellular metabolism. Research suggests PQQ may both promote the number of mitochondria we have as well as our mitochondria's efficiency. More efficient mitochondria supports energy levels, cognitive function, and sleep quality. There is also some evidence it may promote Nerve Growth Factor (NGF) synthesis which can support the growth and survival of neurons. Double Wood's PQQ is Made / Tested in the USA, Non-Gmo, Gluten Free, and Vegan Friendly.