Sodium hyaluronate is the major ingredient that makes up of eye-vitreous body, synovia and so on. HA plays an important role in protecting water, keeping space of outer cell, adjusting penetrative pressure, Lubrication, Improving reparation of cells. HA molecular consists a amount of complicated third class mashy configuration that is formed by effect of both molecule has remarkable stickiness and flexibility. HA taken part in electrolyte alternate control between cells as the major ingredient of celle exerts the effect of message filter of physics and molecule. High molecule HA has restrain effect for the function of cell movement. Multiplication and licking up, low molecular HA has acceleration effect.

While application in medical industry,HA can be used as viscoelastic agent for ophthalmologic operation of artificial lens implantation,as filler for arthritis operation and as slow release formulation for eyedrop. HA also have functions to promote wound healing and prevent adhesions after operations.