Copper Peptide for Hair Starter Set GHK cu Shampoo to Use After Hair Transplant STEMBOTANY Private Label Ghk Cu Serum Copper Peptide Hair Growth Copper Peptide Serum for Hair Growth Peptide Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki