Arsenic Trioxide and Reduced Glutathione Act Synergistically to Augment Inhibition of Thyroid Peroxidase Activity In Vitro Biological Trace Element Research Springer Nature Link Glutathione system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis Cell Death & Disease L Thyroxine (Levothyroxine) Thyroid Hormone MedChemExpress Levothyroxine (Synthroid, Tirosint, Levoxyl) is a medication for treating hypothyroidism (underactive thyroid), a condition that is more common in people with Down syndrome. Health care providers usually recommend taking levothyroxine with water