Pharmacogenomics of insulin like growth factor I generation during GH treatment in children with GH deficiency or Turner syndrome The Pharmacogenomics Journal GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy A) Serum levels of growth hormone (GH) and (B) insulin like growth Download Scientific Diagram Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference