GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Zinc Thymulin GHK Cu Topical Hair Growth Product Infiniwell Hair Rescue: Repair is a combination of two potent peptides, GHK Cu and Zn Thymulin. In studies, GHK Cu has been shown to strengthen existing hair by stimulating growth in areas that lack thickness. Zn Thymulin GHK Cu Pinnacle Performance Labs