we provide sodium hyaluronate. Sodium Hyaluronate is also called Hyaluronate Aciid . HA content is about 15g in a human body. It is molecular weight differ from several thousands to several millions. It is aqueous solution has outstanding moisture keeping ability ,high viscoelasticty and lubricity . It plays an important role in human biologic activity. With the decrease of HA content in skin, the water retaining ability of the skin is weakened, the skin looks coarse and wrinkle. The decrease of HA in other apparatus will lead to arthritis, arteriosclerosis, plus disorder and brain atrophy. All in all the decrease of HA in human body will lead to premature senility.In a word,It is very important and widely used in cosmetics,pharmacy and health and beauty food