GHK Cu Peptide: Mechanism, Anti Aging Research, and Regenerative Benefits GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Same GHK Cu. Better way. Same GHK Cu copper peptide complex. Completely different experience. If you've been eyeing the pen, put it down. We made something better, and your skin barrier will thank you