If you haven't yet tried Ren products I would highly recommend this duo to get your feet wet. Both pack a powerful punch for thirty something skin woes. Ren recommends that you use the glycol lactic mask once a week, which makes it great to pair with the flash facial which you should do every three days. I did these back to back and I was astounded at how well they compliment each other. Love, love, love everything I've tried by Ren.