Losing weight with L carnitine supplements. Yes or no? Cutler Nutrition Liquid L Carnitine Supplement with Acetyl L Carnitine & L Carnitine Tartrate Forms Pre 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 L Carnitine L Tartrate Powder (LCLT) Amino Acid Supplement Powder