We are obsessed with GHK Cu, the skin healing, collagen stimulating copper peptide that works from the inside out., This medical grade peptide helps calm inflammation, smooth fine lines, restore GHK CU Pepora Precision Peptides GHK Cu Copper Peptide Neck & Face Serum 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