Meet the peptide everyone in aesthetics is talking about GHK Cu is known to support collagen production, reduce fine lines, and improve overall skin quality at the source. This isn't just hydrationit's GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As GHK Cu Copper Peptide Neck & Face Serum 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 USA Copper Peptide GHK Cu Powder, DIY Blue Copper for Making the Best Face Cream eBay