GHK Cu: The Peptide Everyone Is Injecting (Big Mistake?) 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 Cellular Glow Copper Peptide GHK Cu Serum for Face GHK Cu before and after : r Biohackers GHK CU Before and After Pictures Topical GHK Cu Skin Results, Face Serum Reviews & Photo Results Neurogan Health