What is Doctor\'s Best Ubiquinol with Kaneka QH? Doctor\'s Best Ubiquinol with Kaneka QH contains the reduced form of Co Q10, Ubiquinol QH. Doctor\'s Best Ubiquinol with Kaneka QH supports healthy heart functioning and supports mitochondria to enhance cellular energy production. Both ubiquinol (CoQ10-H2) and ubiquinone (CoQ10) are metabolically active, and are interchangeable in the body according to needs. Ubiquinol may offer improved bioavailability in individuals who have difficulty achieving high levels of this nutrient, such as aging adults or those concerned with nutrient absorption. How does it work? Both ubiquinol (CoQ10-H2) and ubiquinone (CoQ10) are metabolically active, and are found naturally in the body and in food sources. The two forms are interchangeable, as the body keeps the reduced and oxidized forms in the \"total pool\" at a constant ratio. The commonly available supplement form of coenzyme Q10 has been the oxidized form (ubiquinone), as until recently the reduced form was difficult to manufacture due to its rapid oxidation in the air. New technology has allowed for the manufacturing of stable coenzyme Q10 in the reduced form (ubiquinol). CoQ10 is a key component in the pathway to produce ATP for energy. Why take Doctor\'s Best Ubiquinol with Kaneka QH? CoQ10 levels in the heart and body may begin to naturally decline after age 40. Statin drugs for high cholesterol may drain the body\'s CoQ10 levels even further. Studies that compared the absorption of the two different forms, as well as a human study showing significant absorption of ubiquinol, together suggest that taking ubiquinol orally may offer improved bioavailability in individuals who have difficulty achieving high levels of this nutrient, such as aging adults or those concerned with nutrient absorption.Non-GMO, Gluten free, Soy free.