I'm so happy that I found a product with retinol that doesn't irritate my sensitive skin. I first started applying the serum twice a week and then increased it to every night, without peeling or redness. It helps with reduction of fine lines, by building collagen in the skin, and replacing skin cells at faster rate. I noticed that my skin started to look brighter, fresher and plumper after two weeks of use. I love the serum/oil texture that leaves my skin feeling supple and bright.