GHK Cu Copper Peptide: The Ultimate Peptide For Longevity Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience 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 a growing body of peer Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides GHK Cu Peptide Therapy Collagen & Skin Renewal