Copper Peptides & Retinol Can They Be Used Together? Yes, you can use Copper Peptides & Retinol just be smart about it! Retinol = speeds up cell renewal Copper peptides = support GHK Cu Skin Serum Peptide Rejuvenation GOAL.MD Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Why You Shouldnt Mix GHK Cu with AHA, BHA, or Retinol, If youre using a GHK Cu (Copper Peptide) in your skincare routine, layering it with strong actives like AHA, BHA, or retinol may actually