Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level Ghk cu and skin peptides (topical) Skin regeneration and wrinkle reduction Longevity Protocols