What Is Carrageenan Carrageenan, coded E407, is a natural hydrocolloid extracted from red seaweed. It acts as multi-functional thickener, gelling agent, emulsifier and stabilizer widely used in global food processing industry. Yizhi Konjac Bio-Tech Co., Ltd. specializes in natural hydrophilic colloid integrated production. We supply full series of refined and semi-refined carrageenan, and provide tailor-made compound stabilizer mixed with our self-produced konjac glucomannan.