Sodium Alginate is a natural amylose carbohydrate distilled from alga . It is widely applied to food ,medicine, textile, printing and dyeing , paper-making and daily chemicals as thickener , emulsifier, stabilizer and binder etc. Sodium Alginate is exploring more in food application, especially since 1980s forward. It is not only a safety food additive,but also a basis material of modelling food or dietary food. As the natural cellulose , it can slow the absorption of fatty sugar .and bilesalt , reduce serum cholesterol , triglyceride in the blood. and blood sugar to prevent high blood pressure , diabetes and adiposity,the modern diseases,as well as control the accumulation of noxious metals , such .as Sr , Cd and lead . Its importance has been increasingly recognized by home and abroad,so Japanese call the food rich in sodium Alginate " longevity food " , while Americans call it "magic food additive"