Cellular Glow Copper Peptide GHK Cu Serum for Face GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Neurogan Copper Peptide Hair Scalp Serum for Fuller Softer Shinier Hair Walmart.com GHK Cu 1gram (Copper Peptide) (1000mg), Color : White, Purity : 100% at Rs 900 in Tiruchirappalli