Cartilage of fish is treated with enzyme or alkali so as to obtain an
aqueous solution, which is then defatted, deodorized, decolonized,
filtrated, and dried, such that a mucopolysaccharide is produced.
Alternatively, cartilage of fish is pressure-treated so as to obtain an
aqueous solution, which is then treated with enzyme, defatted,
deodorized, decolorized, filtrated, and dried, such that a
mucopolysaccharide is produced. According to the present invention, a
mucopolysaccharide such as chondroitin sulfuric acid can be produced in a
short time and at a low cost. Further, the mucopolysaccharide produced is
used as a cosmetic material or food material, for example.
