L Carnitine for Weight Loss: Does It Really Work? Benefits, Dosage & Results L Carnitine. Fat burning hero or just another hype supplement? If weight loss is your goal, L Carnitine might support your journey, but it's not a magic fix Here's what it actually does L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Mechanism of L carnitine deficiency in maintenance hemodialysis Download Scientific Diagram The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation