Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com 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 is one of those peptides that has incredible benefits and this Indonesian brand shocked me with a product that is both well formulated and well researched #ghk #copperpeptides #peptides #myseries #indonesianskincare