glutathione generic brand Glutone 500 MG Tablet L-Glutathione (Reduced), 500 mg, 120
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Copper peptides in particular have shown this effect in studies

MEF, mouse embryonic fibroblasts

doi: 10.1177/2058738419828613

The beta gamma subunits of GTP-binding proteins activate the muscarinic K+ channel in heart

Proc Natl Acad Sci USA 88: 48924896 [DOI] [PMC free article] [PubMed] [Google Scholar] Stoker M., Gherardi E., Perryman M., Gray J

So the glutathione actually neutralizes those two free radicals and electronically gives up an electron to kind of get itself oxidized, glutathione gets oxidized themselves, but it neutralizes the damage that's caused by free radicals
