Kiehl's Vital Skin-Strengthening Hyaluronic Acid Super Serum is a lightweight hyaluronic acid serum formulated to strengthen skin and defend against visible signs of aging caused by environmental stressors including pollution, stress, sun exposure, and extreme temperatures. The serum contains 11kDa Hyaluronic Acid, Kiehl's smallest molecular form of hyaluronic acid, which penetrates eight skin surface layers deep to deliver skin-strengthening hydration to the most vulnerable layers, helping retain moisture for improved resiliency, suppleness, and bounce.

The formula features an Adaptogenic Herbal Complex, a proprietary blend of Red Ginseng Root, Holy Basil, and Schisandra Berry, traditionally used in Traditional Chinese, Korean, and Ayurvedic Medicine. These adaptogens work synergistically to defend skin from stressors while renewing and resurfacing skin texture for a smooth, radiant appearance. Clinically demonstrated to improve skin texture by 41%, boost radiance by 29%, improve resilience by 38%, and visibly reduce fine lines by 27% after four weeks of use.

The serum absorbs easily with a lightweight texture and is suitable for all skin types, including sensitive skin. Apply onto cleansed face and neck morning and night before moisturizer. Can also be layered before another serum for enhanced benefits.