Hyaluronic acid, also known as hyaluronic acid, is one of the components of human dermal tissue, which is widely present in the intercellular matrix and can exist normally in the body and can be completely absorbed by the body. Hyaluronic acid can be used in different areas. In addition, hyaluronic acid is also a moisturizing factor for the skin, with the ability to absorb 500-1000 times the volume of water, making it one of the more powerful moisturizing substances in the world. Eye drops, moisturizers, and high-class cosmetics contain this ingredient. It is important to note that there is some variability in the absorption period of hyaluronic acid. However, no matter which hyaluronic acid is used, it can eventually be completely broken down and metabolized by the body, and candidates need to have supplemental injections to keep it for a longer period of time.