Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience Meet the ingredient your skin has been waiting for. GHK Cu, or Copper Tripeptide 1, is one of the most researched anti ageing actives in skincare. It firms. It renews. It supports collagen. And now Essential GHK Cu Serum: What It Is, How It Works, and Why It Matters f Bacteriostaticwater.com Most people think skincare works at the surface level. But healthy skin function starts much deeper than a temporary glow. GHK Cu is a naturally occurring copper binding tripeptide that is already found