what does glutathione do in your body Is the Master Antioxidant? Here’s Science Says Glutathione Treatments 101: Part 1

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The binding affinity is extremely high picomolar at physiological pH placing GHK-Cu among the highest-affinity copper-peptide complexes characterized

GSH and GSSG are also involved in many cellular processes termed S-glutathionylation where disulfide bonds are formed with protein Cys residues that subsequently alter enzymatic activity or protein function

And that brings us back to the central question

Not everyone has a functioning copy of this gene.[ref] The deletion is fairly common, with 50 78% of people, depending on the ethnic group, having the null genotype for GSTM1

(2019) Role of GPX4 in ferroptosis and its pharmacological implication, Free Radic