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 Aesthetics Infinity Medical Institute GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? GHK Cu Injectable Team Wellcore