GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? GHK Copper Peptide GHK Cu Tripeptide 1 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. GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B