Dr. Barbara Sturms NIGHT SERUM has been developed to support the skins nightly regeneration phase. One of the key ingredients, Cotton Thistle Extract supports and stimulatescollagen and regenerates the skin barrier, thus counteracting dry and stressed skin. The active ingredient concentrate uses the night-time to penetrate into the skin and supplies it with Hyaluronic Acid. Plankton Extract helps to reduce the appearance ofwrinkles and instantly makes the complexion appear more even.