Can I use Retinoids with Vitali GHK Cu Copper Peptides? How do I get t Vitali Skincare Retinol Vs Peptides Which Is Better? Science Becomes Her Breaking: more people are starting to explore copper peptides over retinol Not because retinol is bad but because people are beginning to understand how different ingredients actually work. GHK Cu is something your Copper Peptides vs Retinol Can You Use Copper Peptides With Retinol? Copper Peptides vs. Retinol: Which Anti Aging Powerhouse is Right for Pure & Cimple Copper Fusion Cream