Coenzyme Q10 (CoQ10) By Laura Shane-McWhorter, PharmD, University of Utah College of Pharmacy Reviewed / Revised Jan 2023 View Patient Education Claims Evidence Adverse Effects Drug Interactions References More Information Coenzyme Q10 (CoQ10, ubiquinone) is an antioxidant, produced naturally in humans, that is also a cofactor for mitochondrial adenosine triphosphate (ATP) generation.