Injectable GHK Cu: Beginner's Guide to Copper Peptide GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B People are searching for the GHK Cu pen. Ordering it online. Trying to figure out how to use it safely at home. We looked at all of that and thought: there has to GHK Cu (Copper Peptide) is a naturally occurring substance in the body made of a small protein (peptide) and copper. In simple terms, GHK Cu helps the body repair and renew itself. As we