Peptides for Plastic Surgery: Weight Loss, Skin, Healing & Recovery GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works 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.