GHK Cu Peptide Therapy Zen Medicine Skin regeneration, but make it medical GHK Cu is one of our favorite peptides for supporting collagen, repair, and overall skin quality. Subtle. Powerful. Science backed. Available at ModernDay Medspa DM us 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 Peptide (50mg) Advanced Skin Rejuvenation & Healing Support