This peptide reverses aging, And its been hiding in plain sight for decades., GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there., Heres what it does:, GHK Cu is one of my personal favorites for a lot of reasons, but I can say without a doubt that it's use effectively stopped and reversed, my receiving hairline. However, there are The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy