Everyone talks about the glow from GHK Cu Nobody talks about the burn. Yes, GHK Cu gets hyped for tighter looking skin, scar support, collagen support, and regeneration. And the reason people talk about it The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Schematic representation of receptor desensitization and sequestration Download Scientific Diagram Receptor down Regulation an overview ScienceDirect Topics Frontiers Opioid receptor desensitization: mechanisms and its link to tolerance New Biotinylated GHK and Related Copper(II) Complex: Antioxidant and Antiglycant Properties In Vitro against Neurodegenerative Disorders