This serum is a life changer, I absolutely adore it! It made miraculos for my skin, wiped off some years that went alung with the thin lines that I used to have in the eye area. I hesitated a lot to use retionol because I knew it might have side effects if used in an inappropriate way. For me 2 Times a week was enough to get plump and more luminos skin. I usually use it after the shower, when the pores are opened, to increase the absorption rate. The next day SPF30 it's a must!