Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum 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 Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience