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 Hair Growth Serum Intense with Copper Peptide GHK Cu Mayraki Copper Peptide Regenerating Serum for Glowing Skin and Hair Copper Peptides for Hair Serum GHK Cu for Hair PLU Labs Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum 2% GHK CU Copper Tripeptide Hair Regrowth Mercari