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. Key Components Mandelic Acid Lactic Acid Glycolic Acid Indication -18% appearance of fine lines -11% appearance of visible pores +12% appearance of skin radiance +10% appearance of skin clarity How to use 1. Prep + Dispense Once daily after cleansing, in the morning or evening, apply 1/3 of a dropper of Cell Cycle Catalyst with hands to a dry face. 2. Apply + Complete Gently smooth the serum onto dry skin. If using in the morning, apply before a SkinCeuticals vitamin C antioxidant serum and a broad-spectrum sunscreen to protect the skin from UVA/UVB radiation.