As a result of age, the natural rate of hyaluronic acid in skin decreases and it loses volume. Wrinkles form as the skin-epidermis junction sags. Because of its filling function, Hyaluronic Acid instantly adds volume to the skin, significantly reducing wrinkles. It smoothes out all creases, even the deepest ones: Saponin, a bioactive component in Eucerin Hyaluron-Filler Night Care, increases the natural production of Hyaluronic Acid. Under the creases, the weakening cloth is strengthened. Even the deepest creases have been filled in. The thick cream leaves the skin feeling smooth.