What It Is:A powerful anti-aging retinol night serum that helps accelerate skin surface cell renewal to visibly improve fine lines, wrinkles and deep wrinkles.What It Does:This 0.3% retinol night serum visibly reduces fine lines in 5 days and improves deep wrinkles in 2 weeks for a visibly smoother and more youthful appearance. Its innovative packaging isolates a high concentration of pure Retinol powder that is mixed with a lightweight serum to maintain maximum efficacy.Key Ingredients:- Pure Retinol: Kiehl's formula with Pure Retinol helps steadily accelerate skin surface turnover to bring new, fresh skin to the surface to help address visible signs of aging for skin that's visibly renewed and youthful looking.Free Of...- Parabens- Mineral oil- Silicone- Fragrance- DyeHow To Use It:- To activate: Flip the bottle upside down, remove the bottom cap and set aside. Open pouch, twist the retinol capsule onto the bottom of the bottle. Push the button down on the capsule to release pure retinol powder. Shake vigorously to fully mix the serum. Remove and discard capsule, replace with original bottom cap.- To apply: Press down on black button 2-3 times for a pea-sized drop. Gently apply over clean, dry skin.