GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect GHK Cu: The Regenerative Peptide for Skin, Hair, and Healing Pulse & Remedy 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 GHK Cu is a copper peptide known for supporting skin repair, collagen production, and overall tissue healing., Traditionally, its taken as an injection but that can come with irritation, bruising, or