Injectable GHK Cu: Beginner's Guide to Copper Peptide 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, The Secret to Youthful, Glowing Skin? GHK Cu Peptides GHK Cu (Copper Peptides) are one of the most powerful ingredients in advanced skin rejuvenation treatments. This powerhouse peptide helps your skin repair, GHK Cu Peptide Benefits for Skin and Hair LIVV Natural Uses and Benefits #ghk GHK Cu is a naturally occurring peptide in human plasma that declines with age. When used in injections (usually subcutaneous), it can offer various benefits: Skin Rejuvenation and Anti Aging: