Coenzyme Q10 (CoQ10) is a substance that is naturally present in the human body, with the highest levels in the heart, liver, kidneys, and pancreas. It is sold in the United States as a dietary supplement. Because CoQ10 has important functions in the body and because people with some diseases have reduced levels of this substance, researchers have been interested in finding out whether CoQ10 supplements might have health benefits.
- No serious side effects of CoQ10 have been reported. Mild side effects such as insomnia or digestive upsets may occur.
- CoQ10 may interact with the anticoagulant (blood thinner) warfarin and the diabetes drug insulin, and it may not be compatible with some types of cancer treatment.
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