Skin cell renewal slows down as you age. In your youth, skin cell turnover happens approximately every 28 days. When you reach 45 or 50, cell turnover occurs every 45-60 days, and slows down more after 60. You need to gently exfoliate dull surface cells to accelerate cell turnover and reveal significantly smoother, brighter, younger-looking skin. Prevage Progressive Renewal Treatment is an intensive 4-week at-home face-peeling treatment formulated to provide increasingly stronger resurfacing benefits, plus powerful antioxidant protection. Hydroxy acids are naturally derived acids that gently exfoliate surface skin cells. The hydroxy acid resurfacing power increases gradually over 4 weeks to condition your skin for the stronger levels of acid at the end of the treatment. In addition to alpha hydroxy acid (AHA), a next-generation polyhydroxy acid (PHA) is also used. PHAs have larger molecules and offer gentler exfoliation when compared to AHAs, plus PHAs have other benefits, such as moisturization and skin barrier strengthening. Idebenone, the supercharged antioxidant, combines with the hydroxy acids to protect newly revealed skin cells from free-radical damage. Buffered ingredients in this treatment keep the pH level optimally low on skin to ensure continuous and maximized results. See your skin transform week after week.