Now Pharmaceutical Grade L Carnitine Fitnes Support, 3 Oz Walmart.com Neither L Carnitine nor Berberine work like caffeine, yohimbine, or fat burners. They do NOT: Spike your heart rate Jack up your nervous system Cause jitters or crashes Mask L Carnitine doesn't magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and you'll feel the difference @Marybosch shows us how L Carnitine will boost your L Cartinine not a magic fat burner , #gymlifestyle