GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size Biossance GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age GHK Cu vs AHK Cu: A Scientific Comparison of These Peptides Peptide Tech GHK Cu: My secret weapon for skin, hair, and healing I use it two ways topical cream for my face, and subQ injections 3x a week. It boosts collagen, tightens skin, helps How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin