6 potential benefits of l carnitine Good Food Carnitine: the claims and why it may not work Your body already makes L Carnitine, so why do people take it as a supplement? Because while it helps burn fat for energy, it only works when paired with the right lifestyle., So before you jump on This was one of the game changers that helped me lose weight recently! L carnitine supports fat metabolism giving you more energy to burn fat and delay fatigue during physical activity. And it also