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 People are searching for the GHK Cu pen. Ordering it online. Trying to figure out how to use it safely at home. We looked at all of that and thought: there has to Amazon.com: Lovely Southern GHK Cu Peptide Serum 1.5% Copper Peptides Anti Aging Facial Serum for Fine Lines, Skin Elasticity, Made in USA, 1 Fl Oz : Beauty & Personal Care 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