A lightweight retinol serum from Kiehl's, Micro-Dose Anti-Aging Retinol Serum targets early signs of aging with a low-concentration approach. The silky, fast-absorbing texture suits normal to combination skin and users easing into retinoids. Best for nightly layering under a moisturizer, it focuses on gradual improvement in tone and fine lines without heavy residue.
Ingredient Safety
No risk5
Low risk37
Moderate risk1