GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B After a year of using GHK Cu both topically and going deeper than topicals (under my doctor's care), the difference in my skin is not something I have to squint at in good Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping