an·​ti·​ox·​i·​dant | \ ˌan-tē-ˈäk-sə-dənt How to pronounce antioxidant (audio) , ˌan-ˌtī- \

Definition of antioxidant

: a substance (such as beta-carotene or vitamin C) that inhibits oxidation or reactions promoted by oxygen, peroxides, or free radicals

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Other Words from antioxidant

antioxidant adjective

Examples of antioxidant in a Sentence

Recent Examples on the Web Also on sale is the brand's RESIST Super Antioxidant Serum, which utilizes vitamin C, peptides and antioxidants to help preserve and rejuvenate skin. Melissa Lee, USA TODAY, "Nearly every single skincare product is on sale at Paula's Choice right now," 5 June 2020 Working as an antioxidant, lycopene may protect against cancer by preventing cell damage in the body. Detroit Free Press, "Creamy Marinara sauce: A breeze to make and packed with nutrient-rich tomatoes," 29 May 2020 The biochemical composition of flavonols (part of a larger antioxidant class known as flavonoids) appears to enable them to quell inflammation and to scavenge free radicals in the blood and the gut to help prevent cellular damage. Gary Stix, Scientific American, "What’s in Kale (or a Pear) that Seems to Lower Alzheimer’s Risk?," 30 Jan. 2020 Packed with alpha hydroxy acids, hyaluronic acid and peptides, Waldorf likes this eye cream for its protective antioxidant benefits. NBC News, "How to reduce dark under-eye circles, according to dermatologists," 29 Jan. 2020 Vitamin E is another antioxidant option that’s also a good moisturizer, Dr. Newsom says. Sarah Jacoby, SELF, "5 Tips Dermatologists Swear by for Healthy, Glowing Skin," 22 Aug. 2019 Meanwhile the antioxidant quercetin has been shown to combat both acute and chronic inflammation, and protect against neurodegenerative diseases, such as Alzheimer's. Cynthia Sass, Mph,, "4 Health Benefits of Corn," 12 Aug. 2019 L'Oreal Superior Preference Hair Color This permanent color is formulated with camelina seed oil and antioxidants for silkier hair. NBC News, "Best at-home hair color and hair dye kits, according to experts," 1 May 2020 Specifically, the hot-brew method extracts more antioxidants from the grind; the darker the bean, the greater the difference. Jennifer Ouellette, Ars Technica, "The chemistry of cold-brew coffee is so hot right now," 9 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antioxidant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of antioxidant

1919, in the meaning defined above

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Time Traveler for antioxidant

Time Traveler

The first known use of antioxidant was in 1919

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Statistics for antioxidant

Last Updated

12 Jun 2020

Cite this Entry

“Antioxidant.” Dictionary, Merriam-Webster, Accessed 3 Jul. 2020.

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How to pronounce antioxidant (audio)

English Language Learners Definition of antioxidant

: a substance that is added to food and other products to prevent harmful chemical reactions in which oxygen is combined with other substances


an·​ti·​ox·​i·​dant | \ ˌant-ē-ˈäk-səd-ənt, ˌan-ˌtī- How to pronounce antioxidant (audio) \

Medical Definition of antioxidant

: any of various substances (as beta-carotene, vitamin C, and alpha-tocopherol) that inhibit oxidation or reactions promoted by oxygen and peroxides and that include many held to protect the living body from the deleterious effects of free radicals

Other Words from antioxidant

antioxidant adjective

More from Merriam-Webster on antioxidant

Britannica English: Translation of antioxidant for Arabic Speakers Encyclopedia article about antioxidant

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