Glow Peptide Stack Pen Luxus Tanning 150mg GHK CU Pen Get Peptide Pen 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 GHK Cu peptides are known for their powerful role in supporting beauty from within. They work on a cellular level to stimulate collagen production, helping to improve skin elasticity, reduce fine lines, and 150mg GHK CU Pen Get Peptide Pen GHK CU for Sale Tripeptide 1 3rd Party Tested US Made