Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is a potent anti-wrinkle serum with Retinol that visibly reduces the appearance of wrinkles, firms skin’s feel and refines the feeling of skin’s texture for visible renewal with minimal discomfort. The efficacious anti-wrinkle serum with Retinol delivers visible youthful results in a daily-strength micro-dose. Precisely formulated, this patent-pending Retinol serum for anti-ageing uses a daily-strength dose of Pure Retinol to visibly reduce the look of wrinkles, refine the feel of skin’s texture and firm the feel of skin to deliver Retinol benefits with minimal typical signs of discomfort such as redness, dryness and peeling. This powerful micro-dose serum with a trio of Pure Retinol, Peptide and Ceramides promotes surface skin cell turnover while strengthening the skin barrier function to better receive optimal effects of the Retinol-enriched serum and visibly renew skin for younger-looking skin. Precisely formulated to deliver a daily-strength dose of Pure Retinol. This formulation achieves visible results with a minimised likelihood of discomforting side effects including redness, dryness and peeling. The Serum with Peptide and Ceramides helps promote a stronger skin barrier function to prioritise skin’s tolerance of Pure Retinol. 90% of users, including first-time Retinol users, agree skin feels comfortable and 93% agree texture feels refined. 85% of users agreed that skin looks years younger. Easily integrates into a skincare routine, suitable for nightly use from day 1. For all skin types, including first-time Retinol users and sensitive skin types. Based on a consumer test, 132 participants including first time users.