Hyaluronic acid, also known as glycolic acid and hyaluronic acid, is one of the components of the human dermal tissue and is widely found in the intercellular matrix. Since it is one of the components of the human body, it is very safe for people and has no side effects. Hyaluronic acid is also a moisturizing factor for the skin, with the ability to absorb 500-1000 times its volume, compared to collagen molecules which can only carry 30 times the water, making it the strongest moisturizing substance in the world today. It can be found in eye drops, moisturizers, and high-class cosmetics. Later, hyaluronic acid was widely used for cosmetic injections, i.e. soft tissue fillers. Hyaluronic acid has become the safest injectable filler in the world. It can be injected into the wrinkles and depressions of the dermis, or into the areas that wish to be plumped up, and the effect of removing wrinkles and refining the face can be achieved immediately.