L carnitine reduces hyperthyroidism symptoms Successive thyroid storms treated with L carnitine and low doses of Methimazole The American Journal of Medicine This JAMA Patient Page describes hypothyroidism and its risk factors, signs and symptoms, diagnosis, screening, and treatment. https: ja.ma 4oSKMLL L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar