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 Best Acetyl L Carnitine Supplements for Weight Loss L CARNITINE 3000 SUPPLEMENT Weight Loss Turns Fat Into Energy Fat Burner eBay BPI Sports CLA Carnitine Weight Loss Support Formula Fruit Punch 50 Servings Walmart.com L Carnitine Injection In Reno, NV Aesthetics Medspa