GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu for Skin Rejuvenation WeCare Pharmacy GHK Cu Side Effects, Complications, and Risk Profile