Ubiquinol is the reduced (active) form of coenzyme Q10 ( ubiquinone ). The role of coenzyme Q10 (ubiquinone) in cellular health and cellular energy production has been the subject of extensive research in recent decades. In 1978, the British Peter Mitchell was awarded the Nobel Prize for his research on the role of Q10 in energy production mechanisms at the cellular level. Coenzyme Q10 is found in all cells of the body and specifically in the membranes of cytoplasmic organelles (endoplasmic reticulum, ribosomes, Golgi bodies, lysosomes, cytoskeleton and mitochondria). The amount of coenzyme Q10 produced naturally in the body decreases with age and with the use of various drugs (such as statins). The largest amount of the coenzyme is found in the mitochondria, as it plays a crucial role in the production of energy through oxidative phosphorylation. The final result of oxidative phosphorylation is the production of ATP (adenosine triphosphate) which is the energy currency of the cell (used to meet cellular energy needs). More specifically, ubiquinone is an integral element of the electron transport chain during oxidative phosphorylation. The active form of coenzyme Q10 , which results from the acquisition of 2 electrons (reduction), is ubiquinol (=reduced form of ubiquinone ). Ubiquinol then transfers these electrons (electron donation) contributing to the addition of a phosphate group to ADP, turning it into ATP. In addition to the important role of ubiquinol in the production of cellular energy, its ability to donate electrons and be oxidized to ubiquinone makes it one of the most important antioxidants in the body.