Hypothyroidism (underactive thyroid) is more common in people with Down syndrome. About 40% of the adolescents and adults with Down syndrome we have seen at our clinic have hypothyroidism. One of the Hashimoto's vs. Hypothyroidism: Understand the Difference the biostation Frontiers Selenium and thyroid diseases 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 Glutathione for Thyroid Health Victoriahealth.com Ltd Raised plasma glutathione S transferase values in hyperthyroidism and in hypothyroid patients receiving thyroxine replacement The BMJ