Copper Uglies lets talk about it , If youve started GHK Cu injectable peptide and noticed a temporary worsening in your skin (dullness, breakouts, or uneven texture), youre not alone. This A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu Peptide Progress: Week 3 Results 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