GHK cu hard spots at injection site : r Peptides GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care Peptide Therapy for Inflammation: A New Solution 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 Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B