Basic properties of copper peptides

Copper peptides are unstable in acidic environments and release copper ions, rendering them ineffective. Therefore, it is generally not used for acidic cosmetics or needs to be used with acidic cosmetics after a certain period of time. It is easy to hydrolyze under oxidative conditions and can be stored for two weeks at 60 ℃ in water or pH 4.5-7.4 buffer solution. The partition coefficient in octanol phosphate buffered saline indicates that GHK Cu is highly hydrophilic and less stable under conditions of negatively charged lipid diacetyl phosphate. [2]
Copper peptide powder must be stored in a cool, dark, and clean place to ensure a shelf life of at least 12 months. Long term storage is recommended at 4 ℃, and the shelf life can be extended to at least 24 months.