AHK Cu Copper Peptide Hair Growth Study (2007) Plain Language Summary Hairgenetix The new Copper peptide AHK Cu, and why the data shows it could be one of the most beneficial and relevant peptides for both men and women dealing with hair thinning and shedding, It sits in the NOLUVA Copper Peptide Hair Regrowth Serum GHK Cu & AHK Cu 30ml British Harmonia Natural Makeup & Fragrance by British Harmonia UK AHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair Discovery Size (10 mL)