GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or Serums St. Croix Products This peptide reverses aging, And its been hiding in plain sight for decades., GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there., Heres what it does:, GHK Cu Peptide Side Effects Safety, Treatments Neurogan Health Advanced GHK Cu Face Cream 2400mg 4% Firmer Skin Neurogan Neurogan Health 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