Let's cut through the marketing noise and look at the actual science of fat loss. A lot of supplements make big claims, but L Carnitine is heavily backed by research for its Effectiveness varies: L carnitine may help with fat metabolism, but it's not a magic weight loss pilldiet and exercise still matter most. Forms matter: Regular L carnitine general use Acetyl L carnitine brain & energy L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe L Carnitine as Pre Workout Supplement: Guide The Science of Good Health L Carnitine vs Fat Burner Which Is For You?