Role of L carnitine in exercise training: Anti inflammatory, antioxidant, and metabolic interactions ScienceDirect Hypothyroidism: Symptoms, Causes and Support Strategies Drugs and Other Substances Interfering with Thyroid Function Springer Nature Link 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 in hypertensive heart failure Hypertension Research Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome