GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B 7 days on GHK Cu. Here's my honest update. I'm not going to hype this up because the real results don't even start until week 46. But something is already happening. 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 Copper Peptide GHK Cu Tripeptide 1