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 GHK Cu for Skin & Wound Healing: Current Evidence Meeting Point Health Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3 Dr. Brenner Labs GHK Cu Copper Peptide Serum with Hyaluronic Acid Anti Aging Facial Serum, Deep Moisturizing & CLEARED Copper Peptide Skin Care Cream 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