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 How Do GHK Cu And Retinol Work Together For Maximum Results? GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true?, Copper peptide, known as GHK Cu, has a growing body of peer Can You Use GHK Cu Peptides with Vitamin C Serum? Expert Guide