What is PQQ - the disodium salt of pyrroloquinoline quinone - and when is it worth supplementing?

The disodium salt of pyrroloquinoline quinone is a reddish brown powder produced by the non-genetically modified bacterium Hyphomicrobium denitrificans strain CK-275. It also occurs naturally in soil, food as well as breast milk. PQQ is a powerful antioxidant - neutralizing free radicals. It also serves as a cofactor, enabling, by catalyzing specific chemical reactions, the action of many enzymes in our body. It is also known to support the work of mitochondria, where energy is produced to power all the cells in our body.