Skin Restoration: Prioritizing Safety Over Trends 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 GHK CU 50mg True Form Peptides 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK Cu [50mg] Elixser Peptides Buy GHK Cu UK 99%+ HPLC Copper Peptide COA Per Batch