GHK Cu Dosage for Hair Growth and Skin Rejuvenation AHK CU + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan GHK Cu Hair Growth Serum Proven Copper Peptide, $299 GHK Cu Peptide Therapy as the perfect skin and hair rejuvenation tool. Simply combining GHK Cu peptide with your favourite cream or serum creates a blend suitable for application to your face, neck 5 months of 1mg Fin, weekly 1.5mm microneedling and daily 2mg copper peptide injections : r tressless