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. Hyperpolarized [1 13C]Acetyl l Carnitine Probes Tricarboxylic Acid Cycle Activity In Vivo ACS Sensors Thyroid and Adrenal Disorders Anesthesia Key This JAMA Patient Page describes hypothyroidism and its risk factors, signs and symptoms, diagnosis, screening, and treatment. https: ja.ma 4oSKMLL