The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget Subcutaneous Injection: What It Is and How to Give One The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Understanding Peptides: BPC 157, GHK Cu & Beyond Meeting Point Health WO2019167070A1 Topical copper tripeptide composition and process of preparation. Google Patents