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 Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Melatonin Hair Growth Serum GHK cu Stem Cells Scalp Hair Growth Serum STEMBOTANY Copper Peptide Hair Growth Treatment GHK cu, AHK cu, Licorice Root Extract, Ginseng Root Extact