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 GHK Cu Serum PLU Labs Injectable GHK Cu: Beginner's Guide to Copper Peptide How to look much younger within a year , GHK Cu is one of the most studied skin peptides on the planet, it stimulates collagen production, improves firmness, and helps skin recover from damage., I GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective?