Using chitosan oligomer as:

(1). Flavoring agent, Chitosan Oligosaccharides can be added to the spices, dairy products, and fruit juice, which can both enrich the taste of products, and improve the nutrition.

(2). Food preservation, Chitosan Oligosaccharide can be applied in fruit and vegetable preservation because it keep the fruit and vegetable fresh.

(3). Functional additive, Chitosan Oligosaccharide can be applied in Yoghourt, Milk powder because it can adjust the intestinal microflora.