Amazon.com: GHK Cu Copper Peptides Facial Serum with SNAP 8 for Fine Lines, Wrinkles, Firming, Deep Hydration & CollagenAll Skin Types(1 fl.oz 30ml) : Beauty & Personal Care My skin secret at almost 50 , As an esthetician turning the BIG 5 0 this year (and someone who has lost 95 pounds over the past five years) Im constantly testing ways to improve my skin, hair, Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Meet your new skincare essential. GHK Cu is a powerful copper peptide that smooths, renews, and revitalizes the skin from within. Say goodbye to dullness and hello to firmer, youthful, glowing skin.