Carrageenan is a complex polysaccharide extracted from a red algae plant that grows only inclean waters, and it is an all-purpose colloid material that is very suitable for food and food systems.It is used as a dispersion and emulsifying  stabilizer, a swelling agent, fat replacer, thickener, binder, dietary fiber, crystallization inhibitor, and a gelling agent in food applications. In addition to food, it is used in medicine, cosmetics, and other fields. Carrageenan is also expected to be an important natural material of the future.