GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu is a copper peptide known for supporting skin repair, collagen production, and overall tissue healing., Traditionally, its taken as an injection but that can come with irritation, bruising, or 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 you're Peptide Injection Site Reactions: What's Normal, What's Not, and What Revolution Health & Wellness GHK Cu Blue Skies Health & Wellness Clinic GHK Cu Copper Peptide: The Ultimate Peptide For Longevity