The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Frontiers Short stature related to Growth Hormone Insensitivity (GHI) in childhood IGF 1 vs. HGH Which is Better for Growth and Fat Loss? HRT Everyone's calling GHK Cu a miracle peptide But let's separate marketing from mechanism. GHK Cu isn't magic. It's a signal. A signal that: Supports tissue repair Modulates inflammation Enhances collagen +