Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy Retinoids vs Peptides (Matrixyl CP): what to pick + how to pair, Effectiveness: Retinoids (retinol tretinoin) have the strongest clinical data for photoaging (wrinkles, texture, tone). Peptides 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 Copper Peptides vs Retinol: Do You Need Both? Nubeean Noosa