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 Should I Take Acetyl L Carnitine or L Carnitine HealthAid GNC Acetyl L Carnitine Alpha Lipoic Acid: Mood Support Supplement GNC Thorne Acetyl L Carnitine Dietary Supplement, 500 mg Acetyl L Carnitine 1000mg L Carnitine Tartrate Amino Acid 1,500 mg Benevolent Nourishment