Dietary Supllement, with Extend-Rx Technology, Supports Healthy Cardiovascular Function. Coenzyme Q10 is a vitamin-like supplement, take 1 tablet twice daily, preferably with meals. Coenzyme Q10 is a vitamin-like compound necessary for mitochondrial energy production. Years of research have shown CoQ10 supports healthy cardiovascular and immune system functions in addition to its vital role in energy production. CoQ10 is produced synthetically to ensure pharmaceutical-grade material 98% or greater. It is also void of any impurities or Cis-isomers often found in fermented products.