L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation 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 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 Thyroid medication hi res stock photography and images Alamy