L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute What are the symptoms of carnitine (L carnitine) deficiency? The Role of L Carnitine in Kidney Disease and Related Metabolic Dysfunctions 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 How Much L Carnitine Per Day: Expert Guide The Science of Good Health