Exogenous melatonin improves glutathione content, redox state and increases essential oil production in two Salvia species under drought stress Scientific Reports Intracellular Pro'oxidant Activity of Melatonin Deprives U937 Cells of Reduced Glutathione without Affecting Glutathione Melatonin and multiple sclerosis: antioxidant, anti inflammatory and immunomodulator mechanism of action Inflammopharmacology Springer Nature Link The MOST POWERFUL Antioxidant Is Melatonin, NOT Glutathione