AcetylLcarnitine suppresses thyroid hormoneinduced and spontaneous anuran tadpole tail shortening Hanada 2013 Hereditas Wiley Online Library L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar Role of carnitine in disease Nutrition & Metabolism Springer Nature Link A novel treatment for subclinical hyperthyroidism Thyroid Supplement with L Carnitine for Cats Only Natural Pet If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.