Hyaluronic acid was originally used for moisturizing, but now it has been included in the ranks of wrinkle removal and plastic surgery. This plastic surgery technique is to use the non-animal stable hyaluronic acid fermented by bacteria to inject hyaluronic acid into the wrinkles, depressions or parts of the dermis that want to become rich, so as to achieve the effect of removing wrinkles and modifying the face, which can immediately remove wrinkles and change the appearance. Hyaluronic acid's most powerful function is moisturizing. After hyaluronic acid is slowly absorbed by the human body, it will combine with human cells to promote the growth of collagen and make that skin better. After hyaluronic acid has been aging, it will make the skin shrink slowly, and it will return to its original state without flapping, and there will be no bad influence, so the skin will not become slack after injection of hyaluronic acid.