Stabilizing the enzyme in fish odor syndrome Trimethylamine N oxide (TMAO): Pathway, Cardiovascular Risk, Diet & LCMS MS Testing Choline Linus Pauling Institute Oregon State University PDF) [L carnitine treatment and fish odor syndrome: an unwaited adverse effect]. 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