GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Oral Liposomal Copper GHK GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn