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Copper Chelation and Delivery At the most fundamental level, GHK functions as a copper chelator and delivery system - the tripeptide binds Cu with exceptionally high affinity (binding constant approximately 10 M, among the highest known for biological copper chelators), forming a square planar coordination complex where the copper ion is coordinated by the nitrogen atoms of the terminal amino group, the two peptide bonds, and the imidazole nitrogen of histidine

Clin Epigenetics 10 , 118, (2018)

N-Acetylcysteine: A Review of Clinical Usefulness (an Old Drug with New Tricks)

Standard subcutaneous protocol (1-2 mg/day): 50mg vial with split reconstitution mix 25 mg at a time to stay inside the 28-day window

The bottom line Glutathione is a scientifically important molecule, but injecting it is a significant decision