The most common cause of hypothyroidism worldwide is insufficient intake of iodine, a mineral found in iodized salt and some foods (such as seafood and dairy) that is needed for production of Carnitine metabolism and fatigue. Medical conditions that may present Download Table L carnitine tartrate supplementation in the fight against infectious disease Carnitine: the claims and why it may not work Neuroprotective effects of L carnitine towards oxidative stress and inflammatory processes: a review of its importance as a therapeutic drug in some disorders Metabolic Brain Disease Springer Nature Link Carnitine and Thyroid Disease page 1 Life Extension