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Standard Care

TSH Test

The first-line screening test for thyroid function

$75
Results in 2-3 business days2,300+ collection centresNo GP referral needed

1 in 20

Australians have thyroid dysfunction

Source: Australian Institute of Health and Welfare 2023

Why This Test

TSH is the most sensitive screening test for thyroid problems — your pituitary's signal to your thyroid. If TSH is abnormal, your healthcare practitioner will typically add Free T4 (and sometimes Free T3) to characterise the thyroid pattern. Most thyroid issues are first detected through TSH alone, which is why it sits at the top of the thyroid investigation.

What This Test Measures

TSH

If TSH is abnormal, your healthcare practitioner will typically add Free T4 (and sometimes Free T3) to characterise the thyroid pattern. Most thyroid issues are first detected through TSH alone, which is why it sits at the top of the thyroid investigation.

Who May Benefit

  • Unexplained weight changes
  • Persistent fatigue despite adequate sleep
  • Feeling unusually cold or hot
  • Family history of thyroid conditions
  • Hair loss or thinning
  • Brain fog and difficulty concentrating
Sample Type
Blood (venous)
Fasting
Not required
Best Time
Morning is ideal (TSH levels fluctuate during the day)
Results
2-3 business days

Understanding Your Results

Below reference rangeMay warrant further investigation including Free T4 — discuss with your healthcare practitioner
Within reference rangeYour TSH is in the standard reference range
Above reference rangeMay warrant further investigation including Free T4 — discuss with your healthcare practitioner
Your results come with personalised context and next steps. If anything needs attention, we'll guide you through what it means and suggest discussing with your doctor.

Common Questions

No fasting required, but morning testing is ideal as TSH levels naturally fluctuate throughout the day.

TSH (Thyroid Stimulating Hormone) is produced by your pituitary gland and controls how much thyroid hormone your thyroid releases. It's the most sensitive screening test for thyroid function.

No - continue taking your medication as prescribed. Your doctor needs to see your levels while on medication to assess if your dose is correct.

Results are typically available in 2-3 business days via your dashboard.

Related Resources

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This test is relevant for:

Important Information

This test provides health information for educational purposes. Results should be discussed with your healthcare practitioner. Not a substitute for medical advice, diagnosis, or treatment.

NATA-accredited · 2,300+ collection centres

TSH
$75