Hyaluronic acid(HA) also called sodium hyaluronate is a straight chain macromolecular mucopolysaccharide composed of repeat disaccharide units of glucuronic acid and N-acetylglucosamine. It widely consists in the extracellular space of human and animal tissue, vitreum, umbilical cord, skin joints synovia and cockscomb, etc. The commercial HA is commonly a sodium salt, called sodium hyaluronate, habitually called hyaluronic acid. HA is a new biological at home and abroad. Its molecular weight is from several ten thousand to several million. It's aqueous solution has outstanding moisture keeping ability, high viscoelasticity and lubricity. It is widely used in cosmetics, pharmacy and health and beauty food.

It is a special mucopolysacharide that is the normal lubricant in human joints. When present in a joint, even a joint with minimal or no cartilage, it can provide a cushion effect.
 

Cosmetics Use:HA is extensively used by the cosmetic industry and by dermatologists in anti-aging and moisturizing products as HA is very hydroscopic (absorbs and retains water).

Medical Use: HA helps control cell migration which protect cells and also activates the white cells. Since is an endogenous substance, it can be used to reduce the need for antibiotics by stimulating the immune system.HA aslo can reduce bacterial infections and has been found to inhibit the growth of a variety of strains of bacteria. It has also been concluded that HA even reduced the number of chronic bronchitis infections in patients.