L Carnitine is a vital nutrient that plays a key role in energy production by helping transport fatty acids into the mitochondria, where they are converted into fuel. Maintaining optimal L carnitine What is carnitine? Carnitine is produced in the body from the amino acid lysine and naturally occurs in some foods. It supports energy metabolism and muscle function, which are important factors in L Carnitine Oral Bioavailability NOW l Carnitine Supplement Critical Role of Mitochondrial Fatty Acid Metabolism in Normal Cell Function and Pathological Conditions