Botox in a Bottle? Meet GHK Cu: The Ultimate Prescription Only Copper Peptide Cream Looking for firmer, smoother, more radiant skin without irritation? GHK Cu (Copper Tripeptide 1) is a powerful regenerative ingredient that 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 Cu Peptide Serum 30 ml, Copper Peptide Serum with Hyaluronic Acid for Tightening, Collagen Boosting GHK Cu Revival Clinic