GHK Cu Tripeptide 5 mg 60 Sublingual Tablets SuperSmart Multi Peptide + Copper Peptides 1% The Ordinary GHK Cu and Reproductive Health: Mechanisms, Fertility Benefits 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, Say hello to your skin's new BFF GHK Cu is a powerful peptide that supports collagen production, speeds healing, improves hair growth, and helps fight visible signs of aging. This tiny molecule Copper uglies = temporary. When you start GHK Cu, you can get a spike in free copper breakouts, texture, irritation. It's not the peptide failing. It's your body adjusting. Happens fast