Hyaluronic Acid is a natural, viscous, and smooth substance produced by the human body. It is a polysaccharide that is natural in the skin, cartilage, nerve, bones and eyes of the human body. Medical-grade Hyaluronic Acid is one of the hyaluronic acid and we can use it in our skin, face or our bone. If we use Medical-grade Hyaluronic Acid into our skin, it can easily rescue skin elasticity. If you are experiencing some skin problems, maybe you can try to choose our medical-grade hyaluronic acid.