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 Altered carnitine acylcarnitine profiles in levothyroxine treated congenital hypothyroid patients with fatigue: An LC MS MS based study from Bangladesh PLOS One L Carnitine Hypothyroidism With Normal TSH? Thyroid Hormone Conversion Explained Role of carnitine in disease Nutrition & Metabolism Springer Nature Link