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 Review: Niod Copper Amino Isolate Serum CAIS2 My Skincare Regime GHK Cu Peptide Regenerative & Cosmetic Research Hi : ) CAIS is NIOD's Copper Amino Isolate Serum. It contains GHK peptides bound to copper which is known as copper peptides (GHK Cu) that are found in our plasma and are good GHK Cu Topical vs Injection Which is the Better Copper Peptide Form?