Estee Lauder Advanced Night Repair Synchronized Multi-Recovery Complex Serum, 1.7 oz. What It Is: 7 Serums in 1: the super serum that reduces the look of multiple signs of aging for a smoother, younger, more radiant and even toned look. What It Does Every Night: While you sleep, Advanced Night Repair serum helps ignite skin's natural nightly renewal-fast. A high level of Hyaluronic Acid helps lock in moisture for 72 hours. This helps create the perfect environment to optimize skin.