Does L Carnitine Work for Fat Loss? A Dietitian Explains L Carnitine is not a magic fat burner It won't melt fat, build muscle, or replace hard work. The only thing it burns is your money Stick to the basics PCOS Nutrition Center L Carnitine (120 Capsules) PCOS Nutrition Center Creatine sits in that interesting category of supplements that are powerful in one lane and irrelevant in another. It's excellent for short burst muscular performance. It may have cognitive benefits. But it doesn't