This silky and rich serum from Geek & Gorgeous features 5 forms of hyaluronic acid in varying molecular weights and structures to hydrate, soften, and plump the skin. Hyaluronic acid, a natural moisturizing factor, can bind up to 1000 times its weight in water. This formula includes ultra-moisturizing high-molecular-weight versions for surface hydration and medium-molecular-weight versions to strengthen the skin barrier and support natural defense and healing mechanisms. It is suitable for everyone, but especially beneficial for normal to dry skin types. For combination to oily skin, consider the Light version.