Thyroid antibodies Anti-TPO Antibodies
Antibodies aimed at your own thyroid gland.
Also printed asAnti-Thyroid Peroxidase Antibodies · Anti-TPO · TPO Antibodies · Thyroid Peroxidase Ab · TPO Ab · Anti TPO
What it measures
Antibodies your immune system has made against your own thyroid tissue.
Predicts that thyroid function will drift down over the years, so it changes how often you retest rather than what you do today.
Why it matters for how long you stay well
Finding them tells you which way your thyroid is likely to drift, so you can watch it yearly instead of discovering a slow thyroid a decade later. They are a weather forecast, not a verdict.
How it shows up in daily life
They cause no symptoms themselves. What you notice, if anything, comes from the gland slowing down over years.
High and low readings
When it reads high
The immune system is targeting the thyroid; common in Indian women and worth tracking.
When it reads low
Low is good.
What moves it
Daily life
- smoking
- selenium intake
- pregnancy and the year after it
- a family history of thyroid trouble
Common questions
What does Anti-TPO Antibodies measure?
Antibodies your immune system has made against your own thyroid tissue. Predicts that thyroid function will drift down over the years, so it changes how often you retest rather than what you do today.
What does a high Thyroid antibodies result usually mean?
The immune system is targeting the thyroid; common in Indian women and worth tracking.
What does a low Thyroid antibodies result usually mean?
Low is good.
What is the usual reference range for Thyroid antibodies?
A broad adult reference band is below 34 IU/mL. Labs differ, so read your result against the band printed on your own report.
Educational only, not a diagnosis. A single number means little without your history and the rest of your panel, so discuss your own results with your physician.
Typical adult reference band
- Adults
- below 34 IU/mL
Labs differ. The band printed on your own report is the one that applies to your result.
Reported in IU/mL
Ageing relevance
2/5
Relevant to the ageing of one organ, or to disease screening.
Worth knowing
They can appear years before the thyroid slows down, which is why they read as a warning rather than a diagnosis.
Have a report with this marker on it? Read it in context.
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