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 Acetyl L Carnitine Cognitive & Neurological Support Acetyl L carnitine physical chemical, metabolic, and therapeutic properties: relevance for its mode of action in Alzheimer's disease and geriatric depression Molecular Psychiatry Carnitine octanoyltransferase is important for the assimilation of exogenous acetyl L carnitine into acetyl CoA in mammalian cells Journal of Biological Chemistry Acetyl l Carnitine in the Treatment of Peripheral Neuropathies: A Narrative Review Pain and Therapy Springer Nature Link