Hyaluronic acid is a naturally occurring molecule found in the body, specifically in the skin, joints, and eyes. It plays a vital role in maintaining tissue health and hydration, as it can hold up to 1000 times its weight in water. In skincare, hyaluronic acid is used as a humectant, meaning it helps to attract and retain moisture in the skin. This results in a plumper, more hydrated complexion that appears smoother and more youthful. Hyaluronic acid is also used in injectable fillers to add volume to the face and smooth out wrinkles and fine lines. In addition, it has been shown to have anti-inflammatory and antioxidant properties, making it beneficial for overall skin health. Hyaluronic acid is generally considered safe for topical use, and can be found in a variety of skincare products, including serums, moisturizers, and sheet masks.