GHK Cu Copper Peptide Skin & Healing Beverly Hills GHK Cu Sovereign Health Performance Stacking Retatrutide With GHK Cu: Results & What to Expect GHK Cu (Copper Peptide) 50mg 99.80% Purity Research Peptide Miro Biotech 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