In an adult with pattern hair loss or diffuse thinning and no known copper allergy, what is the recommended firstline topical peptide (copperpeptide, GHKCu) regimen? Peptide Therapy for Hair Growth: Explore Your Options Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. The power of copper peptides for hair growth GHK Cu isn't just another trend, it's a science backed peptide that helps stimulate hair follicles, reduce inflammation, and improve scalp health for thicker,