Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK Cu is one of my personal favorites for a lot of reasons, but I can say without a doubt that it's use effectively stopped and reversed, my receiving hairline. However, there are GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Peptide: What It Does for Body Composition and Metabolic Health In situ photo crosslinkable hyaluronic acid based hydrogel embedded with GHK peptide nanofibers for bioactive wound healing ScienceDirect