A daily retinol serum from Kiehl's designed to renew skin with a micro-dose delivery for gradual results. The lightweight, fast-absorbing texture layers well under moisturizers and is suited to retinol newcomers and seasoned users seeking gentle renewal. Ideal for uneven tone and early signs of aging, it’s presented as a daily-use serum that balances efficacy with tolerability.
Ingredient Safety
No risk5
Low risk37
Moderate risk1