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 Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD