col·​la·​gen ˈkä-lə-jən How to pronounce collagen (audio)
: any of a group of fibrous proteins that occur in vertebrates as the chief constituent of connective tissue fibrils and in bones and yield gelatin and glue upon boiling with water
collagenous adjective

Examples of collagen in a Sentence

Recent Examples on the Web This cream is formulated with copper peptides, which can help support elastin and collagen production. Jessie Quinn, Peoplemag, 17 Apr. 2024 The newest one is this collagen powder made with pure, unflavored, powdered beef collagen. Sarah Yang, Sunset Magazine, 16 Apr. 2024 Common protein powder sources are collagen, egg, whey, soy, rice, pea, and hemp seed. Alexandra Paetow Ms Rdn, Parents, 15 Apr. 2024 This is likely due to men having about 20% thicker skin than women and because aging women lose significantly more collagen than aging men do, primarily coinciding with menopause. Daryl Austin, USA TODAY, 11 Apr. 2024 What is collagen and how does salmon stimulate production of it? Veronica Cristino, Vogue, 8 Apr. 2024 The products contain hyaluronic acid microspheres to help smooth fine lines and wrinkles, along with a peptide complex to enhance youthful skin, fatty acids to help protect and restore, and collagen stabilizer to help moisturize and provide a smoothing effect. Dahvi Shira, Forbes, 28 Mar. 2024 Ideal for all skin types, the Dr. Jart+ mask boasts a soft, flexible material for cooling the skin along with an ampoule filled with collagen, niacinamide and glyerin. Danielle Directo-Meston, The Hollywood Reporter, 4 Mar. 2024 David Robert Elliott One product Evelyn does not use is retinol, a form of vitamin A that helps smooth wrinkles and boost collagen production, which begins to slow down around age 25. Dianna Mazzone Singh, Allure, 2 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'collagen.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Greek kolla + International Scientific Vocabulary -gen

First Known Use

circa 1865, in the meaning defined above

Time Traveler
The first known use of collagen was circa 1865

Dictionary Entries Near collagen

Cite this Entry

“Collagen.” Dictionary, Merriam-Webster, Accessed 22 Apr. 2024.

Kids Definition


col·​la·​gen ˈkäl-ə-jən How to pronounce collagen (audio)
: a protein that occurs in the form of fibers, does not dissolve, is found in connective tissue, and forms glue and gelatin upon boiling with water

Medical Definition


col·​la·​gen ˈkäl-ə-jən How to pronounce collagen (audio)
: an insoluble fibrous protein of vertebrates that is the chief constituent of the fibrils of connective tissue (as in skin and tendons) and of the organic substance of bones and yields gelatin and glue on prolonged heating with water
collagenic adjective
collagenous adjective

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