Discover Kiehl's Vital Skin-Strengthening Super Serum, a fast-absorbing, lightweight serum that strengthens skin's barrier, reduces the appearance of signs of ageing and leaves skin feeling protected against daily stressors. For all skin types. Kiehl'ssuper serumstrengthens skin's barrier function. Leaves skin feeling fortified against daily stressors for youthful, radiant skin. Formulated with the smallest molecular size (11kDa) Hyaluronic Acid. This new formula is able to deliver its plumping and hydrating benefits to the skin thanks to its ability to penetrate its deepest surface layers. This powerful formula replenishes and fortifies skin's barrier function. Infused with Herbal Adaptogens, comprising of a blend of Red Ginseng Root, Holy Basil and Schisandra Berry. This serum leaves skin feeling protected from daily stressors and looking revitalised. This lightweight serum helps reduce the look of fine lines, smooth texture and boost radiance for bouncy skin with a healthy-looki