$28.00
Priced per marker, with baseline labs included. You’ll see your total before you pay.
Heart & circulation
TMAO test
Trimethylamine N-oxide. Gut-microbiome-derived metabolite linked to cardiovascular and kidney disease risk.
At a glance
In about 5 days
Most results are ready in about 5 days. Some specialty markers can take up to 21 days.
Check before your draw
This marker has no preparation tag, but it can still need preparation. Contact us before your draw if you’re not sure.
Walk in at Quest
Your lab order arrives by email. Most Quest locations take walk-ins, so bring it with a photo ID.
What it measures
TMAO forms when gut bacteria break down certain nutrients in foods like red meat and eggs, and your liver finishes the job. Higher levels may be linked to heart and kidney disease.
Why it matters for women
Heart disease is the top cause of death for women, and women’s risk is often underestimated. TMAO is a newer marker that connects diet and gut bacteria with heart health, so it’s best read alongside your cholesterol and other heart results.
You might check it if…
- heart disease runs in your family
- you want to see how your diet may relate to heart health
- a doctor mentioned reduced kidney function
What your result may mean
High TMAO: what it may mean
High TMAO (trimethylamine N-oxide) may be linked to a higher risk of heart disease and kidney disease, though researchers are still learning how much it matters. It can build up when gut bacteria break down nutrients in red meat, eggs and dairy, and your liver then finishes the job. Fish can raise it for a short time, and reduced kidney function can slow how fast it clears. Gut bacteria may shift around menopause, and women's heart risk can be underestimated, so a clinician may read this with your cholesterol. You may not notice any symptoms from a high level.
Low TMAO: what it may mean
Low TMAO may be a favorable result from a heart health standpoint. It can mean your gut bacteria are making less of it, which may happen with a diet lower in red meat, eggs and dairy. Recent antibiotics can also lower it for a while by changing your gut bacteria. A low result may need no follow-up on its own, but it can't replace your cholesterol and blood pressure results when a clinician looks at your heart risk.
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These notes provide context and do not diagnose a condition. Not yet available in NY, NJ, RI, HI, ND, SD or WV.