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Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Antioxidants

Antioxidants are natural compounds that protect the body from damage caused by molecules called free radicals. Certain levels of free radicals in the body are normal. But things like pollution, smoking, and toxic heavy metals can cause harmful levels of free radicals in the body. Many experts believe that this damage is a factor in the development of cancer and other conditions.

Antioxidants include some vitamins, such as vitamins C and E, and some minerals, such as selenium. They also include other compounds like flavonoids and polyphenols, which are found in plants.

Fruits and vegetables are good sources of antioxidants. You can also buy antioxidant supplements. But it's best to get antioxidants from healthy foods.

Why It Is Used

Antioxidants may play a role in the management or prevention of some medical conditions, such as some cancers, macular degeneration, Alzheimer's disease, and some arthritis-related conditions.

Risks

The best way to get enough antioxidants is to eat foods that are good sources of them, especially fruits and vegetables. Taking supplements in high doses can be harmful. No single antioxidant alone can protect the body.

The U.S. Food and Drug Administration (FDA) doesn't regulate dietary supplements in the same way it regulates medicines. A dietary supplement can be sold with little or no research on how well it works.

Always tell your doctor if you're using a dietary supplement or if you're thinking about combining a dietary supplement with your standard medical treatment. This is especially important if you are pregnant or breastfeeding.

Related Information

Credits

Current as of: October 7, 2025

Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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Current as of: October 7, 2025

Author: Ignite Healthwise, LLC Staff

Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.