There are 3 main types of thyroid medications available T4 T3 (usually combined with T4) NDT desiccated thyroid (a combination of T4 + T3) Most are widely available Carnitine in Mitochondrial Fatty Acid Transport and Oxidation Encyclopedia MDPI The supplement secret for hyperthyroidism? When dealing with hyperthyroidism or Graves' disease, L carnitine can be a total game changer. It helps block the entry of thyroid hormone into the cell nuclei, potentially Vitamins to be taken away from thyroid medication GNC Total Lean L Carnitine 1000 mg 60 Tablets GNC