The form of GHK Cu you use may matter more than the peptide itself. Which form of GHK Cu have you personally tried before and what was the FIRST noticeable change you experienced? What Is GHK Cu? How It Works in Research and Quality Signals Exploring the Role of Tripeptides in Wound Healing and Skin Regeneration: A Comprehensive Review GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu Peptide: Beginner's Guide to Potential Benefits