GHK Cu Copper Peptide Therapy for Hair & Skin in Mumbai A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle 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 GHKCU Skin Transformation Results After 4 Weeks 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