Kiehl's Since 1851 Retinol Skin-Renewing Daily Micro-Dose Serum

Traditional Retinol triggers skin cell turnover and promotes collagen building to bring youthful, healthy skin to the surface. But at higher levels, the rapid cell exfoliation can overwhelm skin cells causing negative side effects (redness, dryness, peeling).Inspired by the science of “micro-dosing,” the use of precise ratios of potent ingredients, our Retinol serum is precisely formulated to deliver maximum efficacy in a daily-strength dose while minimizing retinol discomfort such as redness, dryness and peeling. Formulated with Pure Retinol, Peptides and Ceramides to fortify the skin barrier and build Retinol tolerance, each micro-dose promotes gentle skin surface renewal for refined skin texture, reduced pores and fine lines and wrinkles. Maximum efficacy – Powerful results you can see:

• 94% agreed skin texture is refined
• 88% agreed pores look minimized
• 88% agreed fine lines look minimized

Minimum discomfort:

• Clinically demonstrated to minimize discomforting effects including redness, dryness and peeling.
• 92% agree skin feels comfortable
• Suitable for daily use starting from the first use
• Suitable for all, including first time users and sensitive skin

Formulated to fit any routine:

• Can be used in the morning OR at night, once per day.
• Fast-absorbing and lightweight, layerable texture.