How to Apply and Use GHK Cu and AHK Cu Hair Serum for Hair Regrowth Peptide Labz Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM If you've ever felt lost trying to reconstitute GHK Cu, this one's for you. I walk you through how I prep it step by step, including transferring it to a larger vial. Think of this Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix