glutathione

noun

glu·​ta·​thi·​one ˌglü-tə-ˈthī-ˌōn How to pronounce glutathione (audio)
: a peptide C10H17N3O6S that contains one amino acid residue each of glutamic acid, cysteine, and glycine, that occurs widely in plant and animal tissues, and that plays an important role in biological oxidation-reduction processes and as a coenzyme

Examples of glutathione in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
And where would topical glutathione be. Claire Dodds, MSNBC Newsweek, 30 Mar. 2026 Most clinical studies show benefits with 250–500 mg of glutathione per day. Brianna Peters, Vogue, 21 Feb. 2026 Taking an oral glutathione supplement has shown promise as a method for reducing oxidative stress in these individuals. Bestreviews, Chicago Tribune, 29 Jan. 2026 At the heart of their research is glutathione treatment. Kara Finnstrom, CBS News, 5 Jan. 2026 See All Example Sentences for glutathione

Word History

Etymology

International Scientific Vocabulary gluta- (from glutamic acid) + thi- + -one

First Known Use

1921, in the meaning defined above

Time Traveler
The first known use of glutathione was in 1921

Browse Nearby Words

Cite this Entry

“Glutathione.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glutathione. Accessed 2 Apr. 2026.

Medical Definition

glutathione

noun
glu·​ta·​thi·​one ˌglüt-ə-ˈthī-ˌōn How to pronounce glutathione (audio)
: a peptide C10H17N3O6S that contains one amino acid residue each of glutamic acid, cysteine, and glycine, that occurs widely in plant and animal tissues, and that plays an important role in biological oxidation-reduction processes and as a coenzyme

More from Merriam-Webster on glutathione

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster