Pre order NOW! Copper Peptides True Hair Growth Serum Based on the Anela Protocol Ghk cu Ahk cu 30ml (1 Fl.oz) Etsy GHK Cu is a naturally occurring copper peptide that declines with age. At 20: abundant. By 60: you have 60% less. What it does: Stimulates collagen and elastin synthesis Promotes wound Helloskin GHK Cu 1% Triple Peptide Regenerative Serum The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline