Clear Comeback Probiotic Enzyme Pro System Add OnAdd an additional serum to your routine with another Active Powder to use with the Hyaluronic Acid Base in your Pro System. Blemish Busting and Pore Refining without Stripping Keep hormonal blemishes at bay or reverse orange peel skin. Clinically shown to reduce blemishes, blackheads, and pore size while repairing and strengthening the skin barrier in 12 weeks.