Coenzyme Q10 (CoQ10) is a natural substance your body makes that helps cells produce energy and protects them from damage. It's especially important for organs that need lots of energy, like your heart and muscles.

Your body makes most of the CoQ10 you need. You also get small amounts from meat, fish, and nuts. CoQ10 levels naturally decline with age.Research suggests CoQ10 supplements may benefit people with heart failure or those experiencing muscle pain from statins. However, the evidence is mixed, and more research is needed.