Copper Peptide (GHK-Cu) Skincare

Copper peptides, decoded. GHK-Cu (listed on ingredient labels as Copper Tripeptide-1) is one of the most-studied skincare peptides, used for skin that looks smoother, firmer and more elastic. Every product here lists it in its formula, mostly in eye creams, moisturizers and masks.

These are topical, cosmetic products, not the injectable “peptides” you may see online. New to it? Read Peptides in K-Beauty: What They Do (and Don’t).