Cell Cycle Catalyst Review,I try to avoid exfoliating serums most of them are quite irritating but this Cell Cycle Catalyst serum is very gentle on my skin, the texture is thin easily absorbed and I only use three drops per application, I prefer to apply it at night then follow with my moisturizer, at first I apply it two times a week then after two weeks I apply it every other day, I start noticing some changes after 2 weeks my skin feels softer and more vibrant than before, I'm very pleased with my results it such an amazing serum and great addition to my routine.