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 All About GHK Cu, the Copper Peptide Reminding Your Skin How to Heal The Editor's Edit GHK Cu Copper Peptide 0.5% (topical foam) Shell Medical Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference