Hyaluronic acid is a kind of hyaluronic acid, a kind of macromolecular polysaccharide, and a linear macromolecular polysaccharide with glucuronic acid -N- glucosamine acetate as disaccharide molecular unit. It belongs to the management of medical devices and belongs to the third category of medical devices. It must be registered and used by the State Administration of Medical Products. However, it is illegal for many beauty institutions to use unregistered uric acid hyaluronic acid. Specifically, you can see if there are any related articles on this website.