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 Prenatal disruption of bloodbrain barrier formation via cyclooxygenase activation leads to lifelong brain inflammation PNAS BPC 157 vs TB 500 vs GHK Cu Inside the GLOW Protocol Revolution Health & Wellness Cellular and molecular mechanisms of the bloodbrain barrier dysfunction in neurodegenerative diseases Fluids and Barriers of the CNS Springer Nature Link