Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess Breaking: more people are starting to explore copper peptides over retinol Not because retinol is bad but because people are beginning to understand how different ingredients actually work. GHK Cu is something your Peptides vs. Retinol Which is Better For Skin 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