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 Ghk Cu Vs Tretinoin For Anti Aging Ghk Cu Vs Tretinoin For Anti Aging Did you know that Tretinoin can damage GHK Copper Peptides?. If you use Tret at night, save your GHK Lux for the morning. , Get the full safety guide on our YouTube Channel!, #platinum_skin_care Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol