Effects of Copper Tripeptide on the Growth and Expression of Growth Factors by Normal and Irradiated Fibroblasts Jeffrey D. Pollard, Susan Quan, Thomas Kang, R. James Koch, 2005 The FDA is now reconsidering 12 peptides it previously placed in Category 2, a designation that blocks compounding pharmacies from producing them. The reasoning centers on safety concerns and limited data, but The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget GHK Cu Peptide Progress: Week 3 Results Enhancing neuronal chloride extrusion rescues 2 3 GABAA mediated analgesia in neuropathic pain Nature Communications