Neurogan Health Copper Peptide GHK CU , 120 mcg, 60 Tablets, 0.52 oz (15 g) eBay GHK Cu Copper Peptide: The Ultimate Peptide For Longevity 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 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK Cu Copper Tripeptide 1 Research Reagent The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline