GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Bulk Supply buy from factory 99% Purity powder GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) Buy GHK Cu Exceptional 99%+ Purity Third Party COA Included The Pretty Purple Peptide with Powerful Benefits That gorgeous blue purple solution isn't just for looksit's GHK Cu, one of the most studied peptides in regenerative medicine. Here's what it can do for Copper, Collagen, and Controversy: Inside the GHK Cu Buzz