Copper Peptide Hair Growth Shampoo GHK Cu for Hair Loss Hairgenetix Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed Subcutaneous Injection Sites and Instructions for Safe Self Administration Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level