GHK-Cu is a naturally occurring copper-binding peptide found in the body, well known in skincare for its role in wound healing and collagen production. It appears in both topical cosmetic products and, less commonly, as an injectable research chemical.
As a topical skincare ingredient, there is a reasonable evidence base supporting benefits for skin firmness, wound healing and collagen stimulation. The injectable research chemical form, marketed for broader systemic anti-ageing effects, has a much thinner and less established evidence base in humans.
Topical use is generally well tolerated with a good safety profile in skincare formulations. Injectable, unregulated versions carry the same unverified purity, dosing and safety concerns as other research chemicals in this category.
Legal and research status: GHK-Cu in topical skincare products is a legally sold cosmetic ingredient. Injectable GHK-Cu sold as a research chemical is not an approved medicine, is not for human consumption, and carries the unverified-sourcing risks described for other peptides in this category.
Topical skincare products are moderately priced and widely available. Injectable research chemical versions are priced per vial with no quality assurance.
Dermatology research on topical GHK-Cu and skin repair. Educational information only regarding injectable use, which is not an approved medicine.