Brand New SkinCeuticals Cell Cycle Catalyst™ Exfoliating Anti-Aging Serum 1fl oz/30ml (Full Size) Cell Cycle Catalyst™ is a daily use, layerable serum clinically proven to boost anti-aging results. Powered in part by a 7.7% multi-acid complex (alpha hydroxy and beta hydroxy acids) and 1% Taurine, Cell Cycle Catalyst™ is clinically tested to gently peel and enhance cellular turnover at the skin’s surface to smooth texture, improve the appearance of discoloration, and the look of visible lines. This anti-aging exfoliating serum helps maintain optimal hydration to support a healthy skin barrier. Cell Cycle Catalyst™ is an optimal first step to boost the results of any anti-aging routine. It can also be used to prepare skin ahead of professional chemical peels. Brand New in Sealed Box Smoke/Pet Free Home