Natural Factors Coenzyme Q10 in easy-to-swallow softgel capsules uses only 100% natural CoQ10, produced from the worlds highest quality material. Unlike synthetic CoQ10, the all-natural form is identical to the body's own coenzyme Q10 for maximum bioavailability and superior effectiveness. This highest grade of Coenzyme Q10 is blended in a base of rice bran oil (not soy oil) for enhanced absorption. Coenzyme Q10, also called CoQ10 or Ubiquinone, is a natural substance essential to cellular energy production. It is also an antioxidant which scavenges free radicals throughout the body.