Researchers extracted and tested chitosan from five different mushroom species as an alternative to traditional crab-derived chitosan for allergic individuals. Using various scientific techniques, they found that chitosan from lion’s mane mushroom (H. erinaceus) had the best ability to dissolve in solution and kill bacteria, making it promising for food preservation. The study shows that mushroom-based chitosan can work as well as or better than shellfish-derived chitosan while avoiding allergen risks, offering a sustainable solution for food packaging and preservation.