GHK Cu Peptide: Mechanism, Anti Aging Research, and Regenerative Benefits Most people think they need to take copper peptides. But Your body already produces its own copper peptide called GHK Cu. But levels naturally decline with age. So Instead of trying to replace GHK Cu is one of the most powerful regenerative peptides for skin, hair, and overall tissue health. GHK Cu supports collagen production, healing, and visible rejuvenation from within. It's commonly used to improve skin A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend