GHK Cu Copper Peptide: The Ultimate Peptide For Longevity If you think GHK Cu is just an expensive skin cream, we need to talk. The truth that 99% of people, and even many doctors, overlook is that this copper peptide is 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 Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess