GHK Cu: The Peptide Everyone Is Injecting (Big Mistake?) Ghk cu and skin peptides (topical) Skin regeneration and wrinkle reduction Longevity Protocols Peptide Forum Science Based Peptide Research Discussion The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 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