GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Can You use Copper Peptides and Retinol Together? Neurogan Health There is no definitive answer as to whether retinol vs peptides are better for anti aging. However, there is a lot more research backing retinol as an effective ingredient, while peptides are still Retinol Alternatives: Why Peptide Based Skincare Is the Future of Anti