PCA Skin Oxygenating Trio Activator Step 1 helps prepare and awaken the skin. Step into a revitalizing skincare experience with the first phase of the Oxygenating Trio. This activator is designed to prepare your skin by gently awakening the complexion. It works by delivering a boost of oxygen to the skin’s surface, encouraging a fresher, more radiant look and feel. This step lays the foundation for the next stages of the trio by enhancing product absorption and supporting a smoother appearance.