Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply Am+Pm 5% B5+GHK Cu Hydrating Serum 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 Not all Copper Peptides are created equal If you've tried copper peptides before and saw no change, here is why: Concentration and Stability. Most serums use a diluted solution that barely scratches Blue Copper Peptide (GHK Cu) Guide: Anti Aging Science, Formulation & OEM