PURE GHK Cu 50mg (3 PEPTID MEDI) 99.8% Purity eBay Everyone seems to be talking about GHK Cu right now but most people still don't understand what it actually does. GHK Cu is a naturally occurring copper binding peptide that has been studied for its Thermodynamically stable ionic liquid microemulsions pioneer pathways for topical delivery and peptide application ScienceDirect Four reasons this serum belongs in your routine. GHK Cu Peptides that firm and support collagen renewal. Barrier support to keep your skin healthy and resilient. No injection. No needles. No clinic visit.