Copper Tripeptide-1

GHK-Cu has demonstrated wound-healing properties by stimulating the breakdown of oversized scar collagen while promoting healthy collagen, elastin, proteoglycan, and glycosaminoglycan synthesis. It exhibits antioxidant activity by stimulating superoxide dismutase and inhibiting oxidation-promoting iron release. Facial studies suggest it can improve skin elasticity, firmness, density, clarity, and reduce fine lines and wrinkles, and it may also stimulate hair follicle enlargement to support hair growth.

Most supporting studies are in vitro or animal-based; the few human facial studies are small and not double-blind placebo-controlled. Anecdotal reports and expert commentary suggest that overuse may elevate free copper levels or trigger excess metalloproteinase activity, potentially accelerating collagen breakdown and skin aging in sensitive individuals. Use on the face may also enlarge hair follicles, which could result in slightly increased facial hair in some users.