L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians There are 3 main types of thyroid medications available T4 T3 (usually combined with T4) NDT desiccated thyroid (a combination of T4 + T3) Most are widely available L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians Levothyroxine (Synthroid) Supplement Interactions Supplements To Avoid While Taking Thyroid Hormones ConsumerLab.com Thyroid medication hi res stock photography and images Alamy Carnitine in Mitochondrial Fatty Acid Transport and Oxidation Encyclopedia MDPI