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.
