AHK CU vs. GHK CU Differences, Benefits & Which Copper Peptide Is Best for Hair Growth Neurogan Health 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 A naturally occurring copper peptide known for supporting skin renewal, collagen production, and overall tissue health. Amaira is where science meets longevity focused care. 246 NE 6th Ave Suite 100, GHK Cu Research Compound NeoPeptide Lab 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK CU