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 GHK Cu Copper Peptide: The Ultimate Peptide For Longevity Do you know what this little blue injection is? It's called GHK Cu aka the Glow Peptide I've always believed in peptides for skincare, but honestly I never thought about