Hyaluronic acid(HA) 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.
Hyaluronic acid exists naturally in all living organisms and is a
unversal components of the spaces between the cells of body tissues
(extracellular space) and eye vitreous body, it has special
function: (1)Moisturizing effect and Nutritional ingredient
(2)Thickening, Lubricating and membrance-forming (3) Sun-screening
and restoration of skin trauma
