The GHK Cu Peptide: Benefits, Uses, and Why it's Known as the Regenerative Copper Complex Pptido de cobre GHK GHK Cu Tripptido 1 Injectable GHK Cu: Beginner's Guide to Copper Peptide Copper Peptide Regenerating Serum for Glowing Skin and Hair If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection