How TSH appears on your report
Look for Thyroid Stimulating Hormone (TSH). The result is normally shown in mIU/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: thyroid medicines, biotin supplements, illness, pregnancy and collection timing can affect it.
TSH range in Australia
Vector tracks TSH against an optimal range of 0.5–3.0 mIU/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 TSH
A single marker rarely explains itself. These results are commonly interpreted together with TSH, and Vector keeps them within reach of each other as your record grows.
Tracking TSH over time
One TSH 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
TSH 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 TSH range in Australia?
Australia has no nationally harmonised reference interval for TSH, 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 TSH against an optimal range of 0.5–3.0 mIU/L, which is deliberately tighter than a population reference interval.
What is the optimal TSH level?
Vector treats 0.5–3.0 mIU/L as the optimal range for TSH. 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 TSH reported in on Australian pathology reports?
TSH is usually reported in mIU/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 TSH result?
Thyroid medicines, biotin supplements, illness, pregnancy and collection timing can affect it.
Sources
- RCPA Manual: Thyroid stimulating hormoneAustralian pathology reference for this test and related result context.
- Healthdirect: thyroid problemsGeneral context for thyroid function and symptoms.
Published 2 August 2026 · Updated 3 August 2026 · Author Vector