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10.2: What is Protein?

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    Proteins, simply put, are macromolecules composed of amino acids. Amino acids are commonly called protein’s building blocks. Proteins are crucial for the nourishment, renewal, and continuance of life. Proteins contain carbon, hydrogen, and oxygen just as carbohydrates and lipids do, but proteins are the only macronutrient with nitrogen.

    Watch the video on Proteins to learn how protein is used in your body

    This page titled 10.2: What is Protein? was last modified on Sun, 27 Sep 2026 02:35:14 GMT and is shared under a not declared license and was authored, remixed, and/or curated by Stephanie Green and Kelli Shallal via source content that was edited to the style and standards of the LibreTexts platform.