| abstract |
PROBLEM TO BE SOLVED: To provide a porphyran whose physiological activity and physical properties are modified, its production and use. SOLUTION: By dissociating a salt from a sulfate group in porphyran, removing the salt, and dissociating the salt of the sulfate group in porphyran to form a free sulfate group, it is possible to obtain physiological activity and physical properties. A modified porphyran is produced. Furthermore, after dissociating and removing the salt from the sulfate group in the porphyran, the sulfate group is converted into a sulfate salt of the salt using a predetermined salt, or the sulfate group salt in the porphyran is converted by ion exchange. Thus, a porphyran modified with respect to the physiological activity and physical properties of porphyran is produced by using a sulfate of a predetermined salt. The porphyran of this invention can be added to cosmetics and food-drinks, and can be used as cosmetics and food-drinks which have hyaluronidase activity inhibitory activity etc. |