Mitoquinone-cyclodextrin is a 1:1 molar ratio complex of Mitoquinone mesylate with cyclodextrin. Mitoquinone mesylate is a mitochondria-targeted antioxidant designed to accumulate within mitochondria in vivo in order to protect against oxidative damage. MitoQ comprises a positively charged lipophilic cation that drives its extensive accumulation within the negatively charged mitochondria inside cells.