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What is coenzyme Q10?

Coenzyme Q10 (CoQ-10) supplements are available at pharmacies across the country. Find out what all the buzz is about.

Published: December 20, 2025 | 3 minutes to read

Written by: Carrie Weisman

Person in workout clothes holds CoQ-10 supplements in one hand and a supplement container in their other hand.

There are lots of dietary supplements available today. And sometimes, the number of options can be hard to sift through. But some shoppers already know what they’re looking for. Coenzyme Q10 (CoQ-10 or ubiquinone) is made naturally by the body and acts as an antioxidant. Supplements are also available. Here’s a breakdown of what it may help support and who it might help most.

In this article:

What is CoQ-10?

CoQ-10 is a naturally occurring antioxidant. This compound wasn’t actually identified until the 1950s. CoQ-10 helps protect cells from damage by warding off chemicals called free radicals. The body uses CoQ-10 to help make energy needed for cells to grow.

CoQ-10 in the body does tend to decrease with age. People taking certain medications may also have lower CoQ-10 levels in their blood, and they may not benefit from supplements.

How can people take CoQ-10?

Natural food sources of CoQ-10 include fatty fish, beef and peanuts. CoQ-10 supplements are currently available as gummies and softgels.

Benefits of CoQ-10

Taking CoQ-10 supplements — either on their own or with other treatment options — might help prevent or treat certain health issues. However, the research is still developing here.

Some ongoing research seems to revolve around heart health. More specifically, that CoQ-10 may reduce the risk of some complications following heart surgery. CoQ-10 might also reduce the risk of heart damage caused by one type of cancer chemotherapy drug.

Still, the U.S. Food and Drug Administration (FDA) has not approved CoQ-10 to be intended to diagnose, treat, cure or prevent any disease. It’s always best to speak to a health care provider before using any kind of supplement.

CoQ-10 side effects

CoQ-10 supplements are generally considered safe. People don’t typically experience serious side effects when taking them. However, it’s always possible to experience some sort of reaction. Side effects of CoQ-10 may include insomnia and upset stomach.

Key takeaways

CoQ-10 may not be the most well-known supplement out there, but it is becoming more popular. The naturally occurring antioxidant is often celebrated for helping protect cells from damage, and the body also uses CoQ-10 to help make the energy needed for cells to grow. As people age, their CoQ-10 levels may decrease. Before taking CoQ-10 supplements, it’s important to speak with a health care provider about the potential benefits and risks.

Frequently asked questions (FAQs)

Some signs of a CoQ-10 deficiency may include muscle weakness and problems with coordination and balance. Other symptoms may include seizures, intellectual disabilities and vision loss. Kidney dysfunction might also occur. If someone starts experiencing any of the above, they should speak to a health care provider right away.

FOR VITAMINS AND SUPPLEMENTS: Consult your health care provider before taking any vitamins or supplements. This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

This content is for informational purposes only and is not intended to replace professional medical advice, diagnosis or treatment. Consult your health care provider if you have any questions about medications, vitamins or supplements you may be considering or changes to your wellness or health care routines.

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