Coenzyme Q also called ubiquinone, is a carrier of hydrogen ions and electrons in the mitochondrial electron transport chain. It transfers electrons between the flavoproteins and the cytochromes. It is nonpolar and can diffuse through the mitochondrial membrane. It is the only component of the respiratory chain that is not fixed. All the other components are proteins.
Coenzyme Q often referred to as coenzyme Q10 or ubiquinone, is a natural compound produced endogenously that helps cells produce energy. CoQ10 is essential for producing ATP by facilitating the transfer of energy stored in food through the electron transport system. As an antioxidant, CoQ10 also helps protect and stabilize cell membranes.
A dietary supplement promoted by alternative medicine practitioners as an antioxidant, and a treatment for gingivitis and heart diseases.