Not all peptides are created equal and neither are our bodies. This is GHK Cu, a copper peptide (nasal spray) supplement from @NeuroGAN. I love experimenting, but I don't go in blind. My GHK Cu 50mg Third Kind Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Peptides eBay Revitalize your skin with the ultimate rejuvenation ally! GHK Cu Nasal Spray by Xenogenix delivers powerful copper peptide goodness to boost collagen, smooth fine lines & give you that youthful glow. GHK Cu 50mg Nasal Spray Biolabs Peptides