GHK Cu Copper Peptide Hair & Scalp Serum YanaSecrets GHK Cu Copper Peptide Benefits, Uses & Safety Intra V Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps Advanced Copper Peptide Hair Regrowth Formula GHK CU & AHK CU, Copper Peptide Hair Growth Treatment Serum For Men Women Fruugo NO