The Risks of Using GHK Cu Peptides in Wellness Trends GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not Amazon.com: Copper Peptides Serum for Face Peptides Collagen Renewal & Anti Aging Serum GHK Cu, EGF, Hyaluronic Acid,Collagen Anti Wrinkle, Firming, Moisturizing Korean Skin Care,25mL 0.88 Fl Oz : Beauty & Personal Care Wholesale AHK CU + GHK CU Hair Serum Pro for your store Faire Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum