I have been using retinol alongside my other esmi products which include my skin mylk anti redness and hydrating moisturiser. I have been using these products for nearly two years consistently and have noticed drastic changes in my skin. My skin is now more brighter, less congested, smoother, less fine lines and wrinkles, more hydrated and glowy! I love all of my esmi products, these ones are my favourites. I always wake up with my skin feeling very firm and hydrated after using the retinol the night before. See my before and after photos for proof of how amazing esmi products are!