Prepared from the same GHK-Cu material as our lyophilised line, dissolved at 2% w/v in an aqueous glycerin base buffered to pH 5.5, sterile-filtered and filled into an amber dropper bottle. It exists so that permeation and reconstructed-tissue work can use a consistent, pre-made reference article rather than a solution made up differently in every laboratory. This is a laboratory reagent, not a cosmetic product, and it is not supplied for application to skin.

Full technical specification, testing methods and batch certificates are on our quality page.