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 L Carnitine, 100 Tablets Oxyenergys L Carnitine. My go to pre post workout supplement. Pre workout I usually take it before my workout session for energy production. Post workout Ill take it the day after my workout L Carnitine, 99% 541 15 1 () (R) 3 Hydroxy 4 (trimethylammonio)butyrate, Vitamin BT PDF) Adding L Carnitine and Selenium to Methimazole in Graves' Disease: A Prospective Randomized Trial on Thyroid Markers and Quality of Life