L Carnitine ((R) Carnitine) Co factor for oxidation MedChemExpress L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar Hyperpolarized [1 13C]Acetyl l Carnitine Probes Tricarboxylic Acid Cycle Activity In Vivo ACS Sensors Carnitine, Acylcarnitines and Beta Oxidation 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.