GHK Cu for Skin: SIGNAL's Guide to Rejuvenation GHK Cu Copper Peptide Skin & Healing Beverly Hills GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Do you get injection site reactions from your GHK CU? , 3 tips to make it better, Room temp , Use a different injection site , Inject the medication sloowwwly , All in all even with injection 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 Injectable GHK Cu: Beginner's Guide to Copper Peptide