Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK Cu in the NAD+ Push Patch: A Smarter Way to Stimulate Collagen, He Hi, Finch GHK Cu Scalp Solution Empower Pharmacy 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK NAD+ and GHK Cu aren't interchangeable! They're complementary One restores what's happening beneath the surface: cellular energy, mental clarity, vitality that lasts beyond a caffeine rush. The other rebuilds what you see: