GHK Cu Peptides Benefits for Anti Aging Skin Rejuvenation How to Use With Micro Infusion Skin Perfection Copper Peptide Serum GHK CU 1% for Dominican Republic Ubuy GHK Cu is a copper peptide that plays a role in tissue repair and collagen synthesis. The result: improved texture, firmness, and overall skin quality. Blue Copper Peptide Serum GHK Cu for All Skin Types Firms Skin, Shrinks Pores, Boosts Collagen for Youthful Appearance