Thyroid Supplement with L Carnitine for Cats Only Natural Pet 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 Altered carnitine acylcarnitine profiles in levothyroxine treated congenital hypothyroid patients with fatigue: An LC MS MS based study from Bangladesh PLOS One Vitamins to be taken away from thyroid medication L Carnitine, 99% 541 15 1 () (R) 3 Hydroxy 4 (trimethylammonio)butyrate, Vitamin BT