L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar Targeting Skeletal Muscle Dysfunction With L Carnitine for the Treatment of Patients With Chronic Obstructive Pulmonary Disease In Vivo