GHK Cu: The Regenerative Peptide for Skin, Hair, and Healing Pulse & Remedy Topical or SubQ GHK Cu? Same molecule. Very different purposes. Topical you apply it on your skin. Think of it as feeding your skin from the outside. In a 12 week study of In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega GHK Copper Peptide GHK Cu Tripeptide 1 Best Repairing Blue Copper Peptide Serum Anti Wrinkle Skin Face Ghk Cu Peptide Blue Copper Peptide Serum and Ghk Cu price Understanding Peptides: BPC 157, GHK Cu & Beyond Meeting Point Health