Chitin is a long-chain polymer of N-acetylglucosamine, a derivative of glucose. It is a key structural component in the exoskeletons of arthropods, such as crustaceans and insects, as well as in the cell walls of fungi. Chitin provides rigidity and protection, making it essential for the survival of these organisms. In food science, chitin is of interest for its potential health benefits, including its role as a dietary fiber and its ability to bind fats, which may aid in weight management. Chitin is also being explored for its applications in biomedicine, such as wound healing and drug delivery systems.