l Carnitine fumarate Pure Prescriptions Foods High in Vitamin C and Why You Need It Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get 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