Potency & Quality Guaranteed An F.D.A. Regulated FacilityCO•QH (Ubiquinol) is the reduced form of CoQ10. Because CO•QH is the active antioxidant form of CoQ10, it is highly bioavailable and therefore more active inside the body (gram per gram) then CoQ10. CO•QH supports the body"s cardiovascular and energy systems by promoting the production of ATP.