MOST EFFECTIVE Scalp Serum Hair Growth Factor 5% GHK CU Copper Peptide Rosemary Scalp Massager Hair Serum Applicator Oil and Growth Serum Comb Bottle 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 GHK CU Copper Peptide, Hair & Scalp Serum, 2 oz (60 ml) GHK Cu Skin Peptide Pen 50mg Noventra Pharma Oh My Health