GHK Cu Peptide for Skin & Hair Facial Serum & Scalp Solution Same GHK Cu. Better way. Same GHK Cu copper peptide complex. Completely different experience. If you've been eyeing the pen, put it down. We made something better, and your skin barrier will thank you GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B GHK CU 100mg Cellgenic GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B