GHK Cu Peptide Serum: Copper Peptides for Skin Firmness Mythos Mythos Skincare GHK Cu Copper Peptide Face Tonic for Firmer Looking Skin Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay GHK Cu Peptide Serum EQLibrium The GHK Cu copper peptide is one of the most underrated skin repair ingredients out there., Naturally found in the body, it plays a key role in collagen and elastin production, skin healing, and GHK Cu (Copper Peptide) is a naturally occurring copper complex that decreases significantly as we age. This powerful peptide is known for its ability to upregulate the production of collagen and elastin, making