Latanoprost and Copper Peptides for Hair Growth, When we talk about topical hair growth support, two ingredients that I find interesting are latanoprost and copper peptides., Latanoprost is a Amazon.com : Mayraki Intense Hair Treatment with Copper Peptide GHK Cu, DHT Blocker for Thicker, Stronger Hair Growth 45 ml 1.52 fl. oz : Beauty & Personal Care Does GHK Cu Regrow Hair? Here's What the Research Shows An Updated Etiology of Hair Loss and the New Cosmeceutical Paradigm in Therapy: Clearing 'the Big Eight Strikes' Copper Peptide Hair Growth Serum (GHK Cu & AHK Cu)