Walgreens Free & Pure L Carnitine 500 mg Capsules Acetyl L Carnitine Arginate 500 mg Combination of Carnitine & L Arginine Benefits 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 Tartrate Acetyl L Carnitine VS L Carnitine: Which is Better? Karnitine Injection 5ml Uses, Price & Substitutes