I'm wondering if it's worth bothering to add tretinoin to my skincare routine? My skin is feeling and looking pretty fabulous thanks to having GHK-cu, KPV, and Gluta in my daily stack. I also have a great line up of topicals in my morning and evening skincare routines and even started using a good red light mask most nights. Still, I'm interested in allllll the aging-grafefully benefits out there (I prefer that term over anti-aging), and I'm wondering if tretinoin would be a good addition. Does anyone use tret along with their research stack?