If you've been diagnosed with Graves' disease, you may be wondering about treatment options. The three main approaches for treating hyperthyroidism are antithyroid medications, radioactive iodine therapy, and thyroidectomy (surgery). Each option Supplements and Thyroid Health: What to Know Penn State PRO Wellness Combination of selenium and L carnitine normalizes the overactive thyroid gland L Carnitine intake and high trimethylamine N oxide plasma levels correlate with low aortic lesions in ApoE transgenic mice expressing CETP ScienceDirect PDF) Adding L Carnitine and Selenium to Methimazole in Graves' Disease: A Prospective Randomized Trial on Thyroid Markers and Quality of Life GRAVES' DISEASE QUICK OVERVIEW What is it? Graves' disease is an autoimmune disorder that causes hyperthyroidism The immune system produces thyroid stimulating immunoglobulins (TSI) These antibodies mimic TSH