Sodium alginate is added to medicines for medical use to give them stability, solubility, etc. It can also be used to increase blood volume and maintain blood pressure, to stabilize the circulatory system before and after surgery, and as an adjunct to treatments such as massive hemorrhagic shock, burn shock, and systemic dehydration. Sodium alginate is a highly viscous polymer compounds, it is different from starch, cellulose, etc., is that it has a carboxyl group, is the aldehyde group of β-D-mannuronic acid with glycosidic bonds to the formation of polyglucuronic acid. Sodium alginate is also a natural dietary fiber, at home and abroad has been increasingly valued, sodium alginate can play a certain role in the protection of the gastrointestinal tract, weight loss, lowering blood glucose, etc., but generally should be used under the guidance of a physician.