Hyaluronic acid is a natural substance, which widely exists in human and animal bodies. With its unique physical and chemical properties, hyaluronic acid has a variety of important physiological functions in our body. Like a molecular sponge, hyaluronic acid is able to retain water up to 500-1000 times of its own weight. It is one of the most hydrophilic molecules in nature which maintains skin elastic and lubricates the joints. Ha applied in cosmetic grade: Moisturecan lock the moisture of 1000times its own weight; Nourish skin soften corneous layer; increase the absorption of nutrients; Sun block neutralize free radicals ;prevent and repair skin injure Other functionslubricate; thicken and stabilize emulsification