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 reduce GHK CU vs. Retinol: Which Is Better For Anti Aging? #antiaging #skincare # retinol #aging #ghkcu YouTube 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 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