GHK Cu Repairing Serum 30ml SumaNurica GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? 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 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 RetinAl vs. RetinOl: Why I Chose the Gentler, Faster, 20x Stronger Retinoid! Copper Peptides vs. Retinol & Vitamin C: What to Choose? by DrBeautiology Medium