Sodium Hyaluronate widely consists in the extracelluar spaces of animal tissue. Almost kinds of animal tissue contain the different quantity of Sodium Hyaluronate. Today Sodium Hyaluronate has been found from skin, cockcomb, brain, vitreum, connective tissue, umbilical cord, human serum, articular fluid, gristle, human urine, cock embryo, oocyte, artery and vein etc. Sodium Hyaluronate is a major component of intercellular substances and distributes in other tissues widely. The main physiological functions as follows: 1) Wound healing 2)Anti-sunburn and repair the injured skin 3) Protection against infection 4)Control of electrolytes and water in extracellular fluids 5) Lubrication 6)Maintenance of stable transparent fluid in the eye