Pyrroloquinoline Quinone Dietary Supplement Nutricost Quality Guaranteed Nutrition - Animal-Free Product Gmp Compliant Facility Non-gmo Product Third Party Tested Gluten-Free PyrroloQuinoline Quinone (PQQ), is an Organic Molecule often found in fruits and vegetables. Plants absorb it through their roots and as such it is naturally present in many different foods from green peppers to kiwis. PQQ is a Cofactor. A Cofactor is required by certain specific enzymes to function.