The naturally occurring peptide GHK reverses age related fibrosis by modulating myofibroblast function He Aging Pathobiology and Therapeutics Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with University of Washington Study: Natural Molecule Counters Sleep Deprivation's Impact on Learning and Memory NMN 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 Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline