A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Self Assembled Peptide Gold Nanoparticle 1D Nanohybrids Functionalized with GHK Tripeptide for Enhanced Wound Healing and Photothermal Therapy ACS Applied Materials & Interfaces