Dietary bioactive ingredients to modulate the gut microbiota derived metabolite TMAO. New opportunities for functional food development Food & Function (RSC Publishing) TMAO & Increased Risk for Heart Attack & Stroke Step One Foods Step One Foods Elevated serum trimethylamine oxide levels as potential biomarker for diabetic kidney disease 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