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 Peptides vs. Retinol Which is Better For Skin Health? GHK Copper Peptide GHK Cu Tripeptide 1 Most skincare stays on the surface., GHK Cu works deepersupporting your skin at the cellular level without the irritation cycle of retinol., No redness., No downtime., Just real support where it