GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) Copper Peptides for Hair Growth Ultrastrong 10% GHK Cu Serum 7x Absorption Made in USA Buy Now with Express International Delivery GoSupps.com The Liposomal Copper GHK from @quicksilverscientific has become a non negotiable in my routine. GHK Cu is a copper peptide that our bodies naturally produce, but has we age, our levels drop significantly. Copper Peptide Liposomes for Skin Care BOC Sciences