Before using this product I was going crazy over my very oily, zit prone skin for someone over 50, let me just say this..... I hope this serum is never discontinued because I need and LOVE it, oh my gosh! I haven't had any oily, greasy mid-day breakthroughs or that ugly unnatural shiny look which is so unflattering. I am a forever fan. Thank you Birch box because if I had not become a subscriber I never would have known about this product, BRAVO!!!