GHK Cu in solution (10ml 10ml) peptide with regenerating, restorative properties for skin and hair. Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 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 Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included 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 Natural Copper Peptide Serum Booster