I just started using this so I really can't speak of whether or not my skin has improved. However, one thing I am not very fond of is that is leaves my skin feeling oily. I have oily skin as it is so I am not sure if this retinol serum is best for me.
It is okay, everyone reacts/ feels a little differently to melatonin, so my review is subjective to myself.. ZzzQuil does help relax me, and I do sleep a little better, but I still cannot stay asleep. I still wake up frequently during the night. Melatonin gives me a groggy feeling in the morning.. I may cut down the dosage by half to see if it helps.