How Anti-TPO appears on your report
Look for Thyroid Peroxidase Antibodies (Anti-TPO). It may also be printed as Anti-TPO. The result is normally shown in kIU/L, next to the reference interval used by the laboratory that ran the test.
Note the collection date before you compare it with anything, along with the context that matters for this marker: autoimmune activity, thyroid treatment and pregnancy can affect the result. It does not measure thyroid hormone levels itself.
Anti-TPO range in Australia
Vector tracks Anti-TPO against an optimal range of 0–34 kIU/L. Australia has no nationally harmonised reference interval for this marker, so the interval printed on your report varies with the laboratory and the assay it used.
Vector’s optimal range is the band the app tracks against and the one printed in the doctor report. Why the two differ.
What to read alongside Anti-TPO
A single marker rarely explains itself. These results are commonly interpreted together with Anti-TPO, and Vector keeps them within reach of each other as your record grows.
Tracking Anti-TPO over time
One Anti-TPO result is a single point. Import the report into Vector, check the extracted value, unit and collection date, and it becomes the start of a series instead — with each later report adding a dated point you can actually compare against.
Further reading
Anti-TPO is read the same way every other result on the report is. These two guides cover that method rather than this marker:
- How to read an Australian pathology report — A practical guide to dates, units, reference intervals and the context that belongs beside an Australian pathology result.
- Pathology report reference ranges: what they mean — Understand the laboratory interval, Australian guidance and the product context Vector adds to a result over time.
Common questions
What is a normal Anti-TPO range in Australia?
Australia has no nationally harmonised reference interval for Anti-TPO, so the range printed on your report varies with the laboratory and the assay it used — always read your result against the interval beside it. Vector tracks Anti-TPO against an optimal range of 0–34 kIU/L, which is deliberately tighter than a population reference interval.
What is the optimal Anti-TPO level?
Vector treats 0–34 kIU/L as the optimal range for Anti-TPO. An optimal range is a target the app tracks against, not a clinical threshold, and it can differ from the interval your laboratory prints.
What unit is Anti-TPO reported in on Australian pathology reports?
Anti-TPO is usually reported in kIU/L on Australian pathology reports. The performing laboratory prints a reference interval in the same unit beside the result, and that interval is the one that governs your individual result.
What can change your Anti-TPO result?
Autoimmune activity, thyroid treatment and pregnancy can affect the result. It does not measure thyroid hormone levels itself.
What else is Anti-TPO called?
Thyroid Peroxidase Antibodies (Anti-TPO) may also appear as Anti-TPO on a pathology report. Laboratories differ in the label they print, which is why Vector matches on several names for the same analyte.
Sources
- MedlinePlus: Thyroid AntibodiesExplains thyroid peroxidase antibodies and their relationship to autoimmune thyroid disease.
- Healthdirect: thyroid problemsGeneral context for thyroid function and symptoms.
Published 2 August 2026 · Updated 3 August 2026 · Author Vector