Agar agar is là polysaccharide được tạo ra từ the cell walls of red algae species, primarily Gelidium and Gracilaria. It has been used for centuries in Asian cuisine and is now a globally important food ingredient valued for its strong gelling properties. Agar forms firm, brittle gels at nồng độs as low as 0.5-1.0%, and unlike gelatin, it sets at room nhiệt độ and is suitable for vegetarian and vegan ứng dụng.
The gel is thermoreversible but has a wide hysteresis between its melting and gelling nhiệt độs. Nó cung cấp excellent thermal độ ổn định. Agar được sử dụng rộng rãi in confectionery, dairy, bakery, and plant-based food sản xuất.