TMAO: Why It Increases & Factors That May Reduce TMAO levels SelfDecode Labs Our researchers discovered a link between TMAO and a higher risk for abdominal aortic aneurysm. TMAO is created by gut bacteria as it digests certain nutrients found in red meat and other Trimethylamine and Trimethylamine N Oxide, a Flavin Containing Monooxygenase 3 (FMO3) Mediated Host Microbiome Metabolic Axis Implicated in Health and Disease Drug Metabolism and Disposition Trimethylamine NOxide Plasma Levels Following Red Meat and Cod Fish Intake: A Pilot Crossover Trial in Hemodialysis Patients Manhes 2025 Molecular Nutrition & Food Research Wiley Online Library