Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health Copper Peptides for Hair Growth Ultrastrong 10% GHK Cu Serum 7x Absorption Made in USA Buy Now with Express International Delivery GoSupps.com GHK CU Pure Pharma Australia GHK Cu 50mg Copper Peptide, Color : Blue, Packaging Type : Vials at Rs 6500 in Nagpur A GHK Cu face serum appears blue because the active ingredient, GHK Cu (copper peptide), is naturally a blue colored powder, meaning its inherent color transfers to the serum when mixed in; this blue hue GHK Cu Copper Peptide Skin Care: Anti Aging Benefits