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 Not all copper peptide serums are formulated the same Before you buy one, make sure you're actually getting pure GHK Cu at the right concentration not just a diluted blend. We spent Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with BLUE Copper Peptide GHK CU Serum with Hyaluronic Acid Anti Wrinkle Assortment eBay GHK Cu Copper Peptide Serum Clinical Anti Aging Skin Repair Beverly Hills Luxury Skincare 30ml 120 ml 4 oz Copper Peptide Duo GHK Cu Anti Aging Serum & Moisturizer