L Carnitine Before or After Workout Which Is Better for Fat Loss ? 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 L CARNITINE increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter L Carnitine Fat Burning Shotsbecause pictures speak louder than words! These little shots are packed with powerful benefits: Supports weight management Helps reduce body fat Converts fat into energy