Cardiovascular Health Supports Healthy Heart Muscle With Selenium & Vitamin E GMP Quality Assured A Dietary SupplementNOW CoQ10 is Pharmaceutical Grade (USP). NOW CoQ10 products contain only 100% natural, all-trans form of CoQ10 produced by fermentation.Coenzyme CoQ10 is a vitamin-like compound also called ubiquinone. It is an essential component of cells and is necessary for mitochondrial energy production. Years of research has shown that CoQ10 supports healthy cardiovascular and immune system functions in addition to its vital role in energy production.