Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance Sports Medicine Springer Nature Link Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Frontiers Glycine Histidine Lysine (GHK) Alleviates Astrocytes Injury of Intracerebral Hemorrhage via the Akt miR 146a 3p AQP4 Pathway Peptides stimulate growth hormone and IGF 1 production, promoting angiogenesis and cellular proliferation. In patients with undetected cancers, these peptides can accelerate tumor growth. Conventional imaging misses early cancers. Circulating tumor Anybody experiment with GHK Cu peptide yet? Its supposed to help regulate your collagen production.