Acetyl L Carnitine Iron & Immune Support 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 is an amino acid that plays a role in energy production, by helping transport fatty acids into the mitochondria. Mitochondria are tiny powerhouses within cells that make energy. Country Life Acetyl L Carnitine 500 mg Vegan Capsules, 60 ct King Soopers