L carnitine reduces hyperthyroidism symptoms This JAMA Patient Page describes hypothyroidism and its risk factors, signs and symptoms, diagnosis, screening, and treatment. https: ja.ma 4oSKMLL Carnitine and Thyroid Disease page 1 Life Extension L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar Hyperthyroidism and Functional Medicine Guide Amy Myers MD AMMD