Can Copper Peptides Be Used with Tretinoin? Guide Neurogan Health GHK CU .005% TRETINOIN .05% ARGIRELINE 20% HYALURONIC ACID ASCORBIC ACID 2% (FACE) 1stChoiceMeds Adobe Express file (13).png 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 & Vitamin C: What to Choose? by DrBeautiology Medium Copper Peptides vs Retinol: Do You Need Both? Nubeean Noosa