Coenzyme Q10 (or just CoQ10 for short) is a naturally-occurring compound that helps your cells' mitochondria generate energy and protects against oxidative damage. Many people in the health industry recommend CoQ10 supplements for various illnesses and symptoms, though its effects are less well-known than other supplements, like vitamin C. But will taking CoQ10 supplements (or eating more CoQ10-rich foods) provide concrete benefits, and what is Coenzyme Q10 normally used to treat anyway?