Trimethylamine N Oxide: The Good, the Bad and the Unknown Emerging role of trimethylamine N oxide (TMAO) in colorectal cancer Applied Microbiology and Biotechnology Springer Nature Link Ever heard of Fish Odor Syndrome? Its a rare condition where the body cant break down trimethylamine a compound found in foods like fish, eggs, and beans. This leads to a strong, fish like smell Breakthrough in studying the enzyme that ultimately produces fish odour syndrome