The Food Use Chitosan segmentation by application isolates four primary demand drivers: preservatives, edible coatings, texture enhancers, and dietary supplements. Preservatives account for the largest share, roughly 35 % of total revenue, because chitosan’s antimicrobial activity extends shelf‑life across meat, seafood, and fresh‑cut produce. Edible coatings, contributing about 30 % of market size, leverage chitosan’s film‑forming ability to create barrier layers that reduce moisture loss and oxidation in fruits and bakery items. Texture enhancers represent approximately 20 % of the market; they are incorporated at low concentrations to modify viscosity, gel strength, and mouthfeel in dairy, sauces, and confectionery. Dietary supplements, while smaller at 15 %, capture growth from functional‑food trends, where chitosan’s cholesterol‑binding and weight‑management properties are marketed to health‑conscious consumers. Collectively, these application categories define the market’s revenue architecture, with each segment’s contribution calibrated to its functional advantage and regulatory acceptance. Regulatory pathways differ across regions, with the United States and EU permitting chitosan as a food additive under specific purity criteria, thereby influencing the relative size of each application segment.