Copper Peptides + Vitamin C and Retinol? Heres How to Layer Them! , GHK Cu works wonders for collagen production, but how do you pair it with other skincare powerhouses like Vitamin C or Retinol? GHK CU Before and After Pictures Topical GHK Cu Skin Results, Face Serum Reviews & Photo Results Neurogan Health I was super skeptical because I've literally tried everything Retinol destroyed my skin. Vitamin C oxidized and stung. Four different peptide serums and nothing actually worked. Then I tried GHK Cu. 6 weeks Retinoids vs Peptides (Matrixyl CP): what to pick + how to pair, Effectiveness: Retinoids (retinol tretinoin) have the strongest clinical data for photoaging (wrinkles, texture, tone). Peptides Copper Peptides for Skin: What GHK Cu Does and How It Compares to Retinol Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow