6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix