GHK Cu Copper Peptide Neck & Face Serum 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 The biological signal for full body skin tightening. If you want to visibly improve skin density, elasticity, and firmness, you need the right biological messenger. Enter GHK Cu (Copper Peptide). This powerful molecule Copper Peptide Serum (GHK Cu + HA) PepDerm Gouri Skin Tightening Before And After Original GHK Copper GHK Copper: Restores Beauty and Diminishes Wrinkles for Younger Looking Skin by Dr. Loren Pickart of Skin Biology Buy or Shop Skin Biology Products Call 1 800 405 1912