What are GHK cu (Glycyl Histidyl Lysine Copper) injections? GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu Injection AgelessRx Four reasons this serum belongs in your routine. GHK Cu Peptides that firm and support collagen renewal. Barrier support to keep your skin healthy and resilient. No injection. No needles. No clinic visit. The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline