Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches Helloskin GHK Cu 1% Triple Peptide Regenerative Serum GHK CU Research Peptide Alpha Carbon Labs 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 Copper Peptide Concentrate, cumpr ingredient cosmetic GHK Cu Scalp Foam Wells Pharmacy Network