GHK Cu Skincare Products SumaNurica Facial Serum w Copper Peptide (GHK Cu), 1 fl oz (topical), Quicksilver Scientific 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 Amazon.com: Copper Peptide Hair Serum with Copper Tripeptide 1 Dual Peptide Scalp Treatment plus Licorice Root Extract : Beauty & Personal Care GHK Cu Peptide Therapy for Radiant Skin by Desert Mobile