The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu is a naturally occurring copper peptide that declines with age. At 20: abundant. By 60: you have 60% less. What it does: Stimulates collagen and elastin synthesis Promotes wound GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Injectable GHK Cu: Beginner's Guide to Copper Peptide Mitigating GHK Cu Injection Pain: Tips and Tricks Gabriel Alizaidy, MD, MS posted on the topic LinkedIn GHK Cu 50mg Particle Peptides