Ghk Cu Peptide Vs Reta Peptides Advanced GHK CU + AHK CU Peptide Hair Growth Serum 30ml Azur Skin I posted about GHK CU about two weeks ago and had a ton of people ask me questions about it in terms of how it works, but also asking about my personal experience. I am not done treatment yet, but in My 90 Day Beard Growth Protocol Using Minoxidil and GHK Cu Peptides (With Progress Pics) : r BioHackingGuide