GHK-Cu peptide (GHKCU Vial) is a research-grade reference compound supplied for in-vitro laboratory study. GHK-Cu peptide is a naturally occurring copper-binding tripeptide (Gly-His-Lys), and is widely referenced in extracellular matrix remodeling, fibroblast activity, and skin/hair research. For research use only. Not for human or veterinary consumption.