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 Frontiers Persistent symptoms in euthyroid Hashimoto's thyroiditis: current hypotheses and emerging management strategies Does Hypothyroidism Cause Headaches? PrimeHealth Denver Glutathione and Autoimmune Disease Master Antioxidant How to Increase Glutathione to Protect Against Hashimoto's The immune system in Hashimoto's thyroiditis: Updating the current state of knowledge on potential therapies and animal model construction ScienceDirect