A lot of people asked how I use GHK Cu (copper peptide) with a pen device, so here's a quick tutorial showing exactly how I do it. In this video I show how The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide Foundry Premium Research Peptides Copper Tri Peptide (GHK Cu) is one of the most researched peptides in skincare, and for good reason. It's a naturally occurring peptide that helps signal the skin to repair and regenerate. As we