L-Carnitine is a natural compound that can be synthesized in the body from the essential amino acids lysine and methionine, or ingested through the diet as found in small amounts in many foods.The main function of L-Carnitine is the transfer of long chain fatty acids to the mitochondria for subsequent β-oxidation.This means that L-Carnitine intervenes in the process of generating heat that leads to "fat burning".