Ubiquinone vs. Ubiquinol
In the body, CoQ10 exists either in its oxidized form, ubiquinone, or in its reduced form, ubiquinol. When oxidized CoQ10 (ubiquinone) is used by the body, it transforms and becomes ubiquinol. In the same way, reduced CoQ10 (ubiquinol) becomes ubiquinone when it carries out its role in the body.
To better understand how this works, let’s take a look at CoQ10 and cellular energy production. CoQ10 is found inside the powerhouses of the cell called the mitochondria, the site where energy production occurs. It acts as an electron acceptor or donor in the chain of reactions that lead to energy production. When oxidized CoQ10 (ubiquinone) accepts an electron from another molecule in the chain, it becomes reduced (ubiquinol) and when reduced CoQ10 (ubiquinol) donates an electron, it becomes oxidized (ubiquinone). Maintaining this state of equilibrium is how the body benefits from CoQ10.