DOWNSTREAM EFFECTS. “Melatonin has been linked to regulation of oxidative stress mostly in the mitochondria, where melatonin is reported to stimulate the activity of glutathione peroxidase (GPx) and glutathione reductase (GRd), two enzymes involved in regulation of the glutathione:glutathione disulfide ratio.”
https://www.nature.com/articles/s41591-018-0271-8?fbclid=IwAR01C2Z4J5lxVYDLhxIb9dPb3fhNSZSxwimZvhHaJ4n3-nVPpkt2PNqoukk