GHK Cu (Copper Peptide) What it does: Signals skin to repair and rebuild. Benefits: Firmer skin, faster healing, collagen boost, less redness, better texture. Takeaway: Skin reset + anti aging GHK Cu is not Botox. It does not freeze a single muscle. It works because it works at the matrix level. GHK Cu stimulates collagen and glycosaminoglycan synthesis, modulates the matrix metalloproteinases that govern Day 10 GHK CU Peptides Skin Journey Skin Peptides UAE: GHK Cu vs GHK Basic Comparison.