When cosmetic surgery becomes an acceptable thing, then more and more people are having cosmetic surgery for various reasons, and at the same time the technology of cosmetic surgery is becoming more and more advanced, hyaluronic acid is the new favorite by the cosmetic surgery industry. Hyaluronic acid is a kind of hyaluronic acid, also known as glyoxalic acid. Natural hyaluronic acid is a high molecular polysaccharide, which is a straight-chain polysaccharide composed of glucuronic acid-N-glucosamine acetate as a disaccharide molecular unit and exists in the intercellular matrix. Initially, hyaluronic acid was only used for moisturizing, but later it was discovered that hyaluronic acid is very useful for wrinkle removal and plastic surgery. It can immediately remove wrinkles and change the appearance of the face, so it is regarded as a new favorite by the cosmetic surgery industry. Hyaluronic acid is found in the dermis of human skin and is mainly responsible for storing water and increasing the volume of the skin, making it look full, plump and elastic. As we age, hyaluronic acid gradually disappears and is replaced by dry, sagging skin that loses moisture. In the past, the source of hyaluronic acid was mostly extracted from animals, but with the continuous development of cosmetic surgery, the demand for hyaluronic acid is increasing, and now it is synthesized artificially to eliminate allergy and infection problems.