GHK Cu Tripeptide 5 mg 60 Sublingual Tablets SuperSmart This peptide reverses aging And it's been hiding in plain sight for decades. GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there. Here's what it does: Boosts Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Before their use in skincare, Copper Peptides were originally introduced in wound healing research. Listen to the sounds of copper peptides and stay tuned to learn more