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 How to Take L Carnitine Liquid: Complete Guide The Science of Good Health Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health How to Take L Carnitine Correctly to Boost Your Training Bodybuilding.com L Carnitine How Much L Carnitine Per Day: Expert Guide The Science of Good Health