Essential L Carnitine Optimal Health Systems Goli Apple Cider Vinegar Gummies at Rite Aid: A Realistic Look for Daily Wellness Routines 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 Some supplements that can lower blood sugar may lower it too much if you take them with medication. Other supplements may raise blood sugar. See link below