Trimethylamine N Oxide (TMAO) as a Biomarker Springer Nature Link TMAO is a byproduct formed by gut bacteria digesting nutrients found in red meat, eggs and other animal products. New research finds high levels of TMAO in the blood predicts the future Scientists make breakthrough in studying the enzyme involved in fish odor syndrome Full article: Trimethylamine N Oxide (TMAO) in Seafoods: Shared Mechanisms Between Fish and Humans for Forming Gut Microbial TMAO: Overview of Animal TMAO Yield Potential