GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy I have had difficulty sleeping during this month of Ramadan. This is the result of 4 weeks of using GHK Cu Peptide. #ghkcu #peptide #looksmax #look #lookism Peptide Therapy for Hair Growth: Explore Your Options