AHK CU vs. GHK CU Differences, Benefits & Which Copper Peptide Is Best for Hair Growth Neurogan Health Definitive Guide on Peptides for Skin and Hair Care Infusion Clinic ABQ The Science and Benefits of GHK Cu Peptide: Skincare, Hair Growth, and Beyond GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health GHK Cu is one of my personal favorites for a lot of reasons, but I can say without a doubt that it's use effectively stopped and reversed, my receiving hairline. However, there are