GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size PEPTIDE Mousai Wellness Center 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 Peptide for Skin & Hair Facial Serum & Scalp Solution