The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Understanding Peptides: BPC 157, GHK Cu & Beyond Meeting Point Health GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit Subcutaneous Injection: What It Is and How to Give One