Most skincare works on the surface. GHK Cu works deeper as a biological signal that helps guide the body's natural repair processes. Research has shown its potential to support collagen production, tissue remodeling, Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy read goop peptide stacking, explained. what began as a niche protocol in biohacking circles is quietly entering a more mainstream conversation, showing up in functional medicine practices and aesthetic clinics alike.