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Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum scores 9.0/9.8 overall. It ranks highest in hydration efficacy (9.6) and low irritation risk (9.5).
One of the most effective humectants
Lightweight humectant and solvent
Humectant with antimicrobial properties
Estimated — based on ingredient analysis. Scores refine as user reviews are added.
Scores last verified: April 2026
Kiehl's Retinol Skin-Renewing Daily Micro-Dose Serum is an excellent serum with an overall score of 9.0/9.8. Positioned in the premium bracket, it delivers a well-rounded formulation that balances efficacy with gentleness. The formula leads with Glycerin, Butylene Glycol, Pentylene Glycol — ingredients that support the skin barrier and moisture levels.
It performs well on hydration (9.6) and low irritation risk (9.5) and active strength (7.8).
Great for
Draws in moisture — #2 in the INCI list
Draws in moisture — #3 in the INCI list
Draws in moisture — #4 in the INCI list
Works on your skin — #5 in the INCI list
Softens and smooths — #6 in the INCI list
42 ingredients — listed in INCI order (highest concentration first)
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© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.