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 GHK Cu Face Serum 1200MG Lab Tested & High Potency Neurogan Health Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 GHK Cu Copper Peptide Hair & Scalp Serum GHK Cu Copper Peptide Neck & Face Serum