Kiehl's - Biucikacska review for Retinol Fast Release Wrinkle-Reducing 0.3% Night Serum

This is a very powerful night serum with 0,3 % retinol. REnews cell renewal on the surface and penetrates up to 15 surface layers deep into the skin. I used it once as a sample and I have seen immediate improvement on my skin. The sample contained a serum and in the white capsule the retinol powder. It said it should be shaken, than the capsule pressed until it cracks and should be mixed together by pressing on the sachet. After that I applied it and in the morning there was this amazing skin!