Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Discover the Power of GHK Cu: Stimulating Collagen Production and Repairing Damaged Tissues PARTICLE, s. r. o. GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide Before and After Results