Chitin is a polymer, just like protein, yet it is not a protein. Chitin is made of amino sugars, whereas protein is made of amino acids. Hence, chitin wouldn't be regarded as a protein source. Yet, chitin behaves fairly similarly to some proteins. For instance, the human body contains the protein keratin, which aids in the formation of hair and nails. Chitin, however, produces a hard outer shell or armour in organisms for protection, not hair or nails. Its primary role in animals is to hydrate and safeguard soft tissue.
You probably know more about chitin than you think. Very likely, it has occasionally appeared on your dinner plate. Chitin can be found in a variety of foods, including lobster, mushrooms, insects, and prawn. Chitin is an excellent source of insoluble fibre when ingested. In actuality, the fibre in chitin gives the gut flora prebiotic qualities. This indicates that it promotes the development of healthy microorganisms in the body.
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