Understanding the Difference Between Glow and GHKCU Peptides Peptide Therapy in The Colony TX The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Helloskin GHK Cu 1% Triple Peptide Regenerative Serum 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