Chitosan has been used in wound healing for decades. As it consists of amino sugars that are naturally occurring in the human body, chitosan is biocompatible, biodegradable and with low toxicity. It has film-forming properties, allowing it to adhere to the surface of the skin, covering it in a thin, breathable film that helps to lock in moisture while keeping out external aggressors, supporting the skin's natural repair process, wound healing and minimizing scar formation.