Efficacy of L carnitine supplementation for improving lean body mass and physical function in patients on hemodialysis: a randomized controlled trial European Journal of Clinical Nutrition Carnitine: the claims and why it may not work Role of carnitine in disease Nutrition & Metabolism Springer Nature Link Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome Hypothyroidism is a condition where the thyroid gland does not produce enough thyroid hormone which is crucial to regulate the body's metabolism and growth development. There can be various causes that contribute Is it safe to take L carnitine with levothyroxine (thyroid medication)?