This multifunctional serum is proven to amplify and maintain the skin's hyaluronic acid levels to help restore the natural appearance of plumpness, smoothness and firmness. HA Intensifier from SkinCeuticals is an ideal at home complement to professional injectable treatments, this serum also helps to improve the appearance of crows feet, nasolabial folds and marionette lines while promoting tighter skin and an overall refined complexion.