Kiehl's potent retinol serum is formulated with pure retinol in a daily-strength micro-dose, along with ceramides and peptide, to promote gentle skin surface turnover for youthful-looking skin. The precise micro-dose formulation of Kiehl's anti-aging serum delivers visible results with minimal visible redness, dryness or peeling. Wrinkles appear visibly reduced, skin appears firmer, pores appear minimized and skin tone and texture appear more even.