Kiehl's SinceKiehl's Since 1851 Retinol Skin-renewing Daily Micro-dose Serum 1 Oz.

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What It Is: A potent retinol serum in a daily-strength micro-dose that visibly reduces wrinkles, firms skin, evens skin tone and smoothes texture with minimal discomfort. What It Does: Kiehl's retinol serum is formulated with 0.1% Pure Retinol along with Ceramides and Peptide to visibly reduce wrinkles, firm skin, visibly minimize pores and even skin tone and texture. The micro-dose formulation delivers visible results with minimal visible redness, dryness or peeling. Kiehl's retinol serum is a