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 Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum