Why I Have to Cut My Hair Every Week (GHK Cu Review), Maximize your cellular regeneration using high concentration GHK Cu copper peptides to stimulate 150% hair density and a 70% increase in collagen 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 GHK Cu Organic Serum Copper Peptide for Anti Aging & Skin Repair Understanding Copper Peptides in Beard Oil MAYRAKI 2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care