L Carnitine Uses & Benefits Explained: A Complete Guide The Science of Good Health L Carnitine isn't magic but it can be a powerful tool when your training and nutrition are already dialed in Here's why I like it Supports fat metabolism L Carnitine helps The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation WHAT IS L'CARNITINE? L'Carnitine is like a taxi for fat molecules, helping them get into cells to produce energy. It's found naturally in meat and dairy and can help with burning fat,