Sodium hyaluronate (Hyaluronic acid, referred to as HA),It is a macromolecular mucopolysaccharide formed by the repeated connection of -acetylglucosamine and D-glucuronic acid disaccharide units. It is also a natural macromolecule widely present in the skin and other tissues. It has excellent moisturizing effect. 1 gram of HA can Locks 1,000 times its weight in water, known as the ideal “natural moisturizing factor”. Commercially available hyaluronic acid is generally in the form of its sodium salt, known as sodium hyaluronate.