Kiehl's Since 1851 Retinol Fast-Release Wrinkle Reducing Night Serum

What it is: A powerful retinol night serum that helps support skin surface cells to visibly improve fine lines and wrinkles.

Skin Type: Normal, Dry, Combination, and Oily

Skincare Concerns: Fine Lines and Wrinkles, Uneven Texture, and Loss of Firmness and Elasticity

Formulation: Lightweight Serum

Highlighted Ingredients:
- Pure Retinol: Supports skin-surface turnover to address visible signs of aging for renewed-feeling skin.

Ingredient Callouts: This product is vegan, gluten-free, cruelty-free, and comes in recyclable packaging.

What Else You Need to Know: This retinol night serum visibly reduces fine lines in as little as five days and improves the look of wrinkles in as little as two weeks for a visibly smoother and more youthful appearance. Its innovative packaging isolates a high concentration of pure retinol powder that's mixed with a lightweight serum to maintain maximum efficacy.

Clinical Results: Results are based on expert grading in a 10-week clinical study with 60 panelists:
- Visibly smooths skin immediately by penetrating up to 15 surface layers deep
- Visibly reduces fine lines and wrinkles in 5 days
- Visibly reduces deep wrinkles in 2 weeks