Ingredient library
GHK-Cu (copper peptide)
INCI: Copper Tripeptide-1
Hero copper-binding tripeptide (Gly-His-Lys complexed with copper) for a denser, longer-looking lash line and healthier-looking follicle environment - the lead story peptide on this serum.
Evidence and limitations
Peer-reviewed literature supports GHK-Cu in skin repair and hair-follicle signalling contexts; dedicated eyelash RCTs are limited. Finished-product appearance outcomes sit in the RUSKI panel on file.