Acetyl L Carnitine Supplement (ALCAR) 500 mg Superior Labs Chronic liver injury decreases levels of cerebral carnitine and acetylcarnitine in rats partly due to the downregulation of organic cation transporters OCT1 2 and OCTN2 at the blood brain barrier ScienceDirect Improves memory." "Sharpens focus." These are just some claims you may see on the supplements that adults over age 50 are taking to try to keep their brains healthy. Do these products Hyperpolarized [1 13C]Acetyl l Carnitine Probes Tricarboxylic Acid Cycle Activity In Vivo ACS Sensors