GHK Cu Copper Peptide Skin & Healing Beverly Hills GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more, , , Heres what it can do:, Boost collagen for smoother, firmer skin, Anti aging improves fine Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous