BREAK IT DOWN GLOW STACK is just one of the many different types of peptides we offer as a part of our PEPTIDE THERAPY PROGRAM! DID YOU KNOW? This peptide GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health 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,