Glutathione SR NSF This one antioxidant is ULTRA important for your thyroid function Glutathione is our body's master antioxidant meaning it's the most important and abundant one. As it relates to the thyroid, think How safe is radioactive iodine therapy? The role of selenium for patients to complement, used alongside the treatment for mild Graves' Disease, particularly to improve quality of life and reduce eye problems in patients with mild Thyroid Eye Hyperthyroidism: Symptoms, Causes and Support Strategies