Copper Peptides vs. Retinol & Vitamin C: What to Choose? by DrBeautiology Medium 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 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