Copper Peptides vs. Retinol: Which Anti Aging Powerhouse is Right for Pure & Cimple 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 Retinol vs. GHK Cu Two key ingredients used to address visible signs of ageing. Retinol A popular synthetic molecule that accelerates cellular turnover and skin resurfacing, helping to promote even skin Copper Peptide Regenerating Serum for Glowing Skin and Hair