GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or GHK Cu Peptide Skin Cream Levers.Health GHK Cu Peptide (50mg) Advanced Skin Rejuvenation & Healing Support What Is GHK Cu? How It Works in Research and Quality Signals A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue GHK Cu