Choline Linus Pauling Institute Oregon State University Trimethylaminuria: Definition, symptoms, and more 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 Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Carnitine_tekst Molecule of the Month September 2003 Acetyl L carnitine is a white crystalline solid that resembles snow. It has a mild odor similar to vinegar. It is a metabolite of L carnitine, derived from the amino acid L lysine in a series