Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration PEPTIDE SPOTLIGHT: GHK Cu (Copper Peptide) Loose skin. Crepey texture. Dull, tired looking skin. Let's talk about the peptide that actually supports skin firmness from the inside out GHK Cu is Copper Peptide (GHK CU) 1% Serum