What is GHK Cu Collagen and Elastin Support Neurogan Health Why I Use GHK Cu: The Copper Peptide That Talks to Your Cells Peptide Injections: What They Are, What They Promise, and the Big Unknowns GHK Cu is not Botox. It does not freeze a single muscle. It works because it works at the matrix level. GHK Cu stimulates collagen and glycosaminoglycan synthesis, modulates the matrix metalloproteinases that govern