Role of carnitine in disease Nutrition & Metabolism Springer Nature Link 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 Targeting Skeletal Muscle Dysfunction With L Carnitine for the Treatment of Patients With Chronic Obstructive Pulmonary Disease In Vivo 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 Acetyl L Carnitine L Carnitine 3000, Orange Mango, 15.72 fl oz (465 ml)