L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians L Carnitine Benefits, Sources, and Side Effects Adding L Carnitine and Selenium to Methimazole in Graves' Disease: A Prospective Randomized Trial on Thyroid Markers and Quality of Life Now L Carnitine Tartrate 1000mg, 150 Tablets Highland Health Foods Successive thyroid storms treated with L carnitine and low doses of Methimazole The American Journal of Medicine 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.