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In rabbit models, GHK-Cu accelerated wound contraction, the formation of granulation tissue, and the activity of antioxidant enzymes

Aging-related changes in the thiol/disulfide redox state: implications for the use of thiol antioxidants

It makes for a much more efficient delivery method of the active GHK-Cu, which can penetrate through the layers of skin through injection, but that doesn't come without its risks

A 2025 intravenous safety study involving two healthy adults found infusions up to 20 mg well tolerated, with no adverse events or clinically meaningful changes in vital signs or laboratory biomarkers