Retinol Vs Peptides Which Is Better? Science Becomes Her Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess Copper Peptide Duo GHK Cu Anti Aging Serum & Moisturizer 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 GHK Cu Peptide Skin Cream Levers.Health