12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK GHK Copper Peptide GHK Cu Tripeptide 1 Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Biossance GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link