Copper peptides are naturally occurring in the skin and are used to help skin perform at its best. , That is why our lab formulated Copper Amino Isolate Serum (CAIS 3 1:1) our third (and hopefully Private Label GHK Cu & SNAP 8 Copper Peptide Anti Wrinkle Firming Serum GHK cu Serum MCCM Medical Cosmetics 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 Copper Peptide Serum Private Label Skin Repair with Label Copper Amino Isolate Lipid 1% (CAIL) NIOD