GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age Peptide Injection Site Reactions: What's Normal, What's Not, and What Revolution Health & Wellness GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD 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