Natural Factors Coenzyme Q10 in easy-to-swallow softgel capsules is derived from 100% natural-sourced materials. This highest grade of Coenzyme Q10 is blended in a base of rice bran oil for enhanced absorption. Coenzyme Q10, also called CoQ10 or Ubiquinol, is a natural substance essential to cellular energy production. It is also an antioxidant that scavenges free radicals throughout the body and is involved in maintaining normal heart function. CoQ10 works well with Vitamin E and other antioxidants.