Most people talk about carnitine like it is one supplement. It is not. Acetyl L carnitine and L carnitine L tartrate do different jobs, and picking the wrong one for the wrong goal is where people Most people talk about carnitine like it is one supplement. It is not. Acetyl L carnitine and L carnitine L tartrate do different jobs, and picking the wrong one for the wrong goal is where people Difference between L Carnitine and L Carnitine L Tartrate Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health L Carnitine for Fat Loss: The Science Backed Secret to Shredding Safely