Coenzyme Q10 (CoQ10) is a substance that occurs naturally in the body and acts as an antioxidant and participates in energy production. Coenzyme Q10 deficiency may be associated m.in with old age, taking certain medications, nutritional deficiencies or certain medical conditions. There are reports that coenzyme Q10 may support skin and brain health, as well as protect against chronic diseases such as diabetes or cancer. In pharmacies, dietary supplements containing coenzyme Q10 are available, which can be used in people exposed to its deficiency.