I'm sure Gina will be around to give you a great answer once this has been switched to fashion and beauty... but from what I've heard it's wise to only use scrubs 1-2 times a week to avoid stripping the skin, and when you're young your skin is pretty good at maintaining its own cell turnover (dead skin cell layers form less quickly and come off on their own more effectively). Once you hit your 30s there are lots of great daily cleansers that contain gentle acids that help to keep dulling dead skin cells in check but I think it could be drying to overdo it with any type of exfoliant...