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Why store GHK-Cu cold and away from light: Peptide bonds hydrolyze faster at higher temperatures (Arrhenius kinetics: reaction rate roughly doubles per 10 degrees Celsius increase)

The peptide has high affinity for copper(II) the binding constant is approximately 10^16 M^-1

Defense Against Liver Diseases Research suggests that glutathione may act as a safeguard against various liver diseases, including non-alcoholic fatty liver disease (NAFLD), alcoholic liver disease, and viral hepatitis

Omitting parts of your medical history is another major mistake

Round up to the nearest 1,000mg to maximize buffering, or round down if you're more GI-sensitive