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 GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy GHK Cu Side Effects, Complications, and Risk Profile A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu Copper Peptide Skin & Healing Beverly Hills Glow Peptide Injection: Revolutionizing Skin Rejuvenation Hubmed