Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs Copper Peptide Skincare Routine: How to Layer Peptides Glimmer Goddess 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