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 Is Glycyl Histidyl Lysine Copper (GHK Cu) absorbed sublingually? LVLUP Health GHK Cu Oral Copper Peptide Capsules Holistic Lifestyler Bunbury Chiropractic Services & Supplement Store 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