All your results, in one place.
Add a report from your GP, the NHS App or a clinic, and see your results, medicine and how you feel over time. We explain each level in plain words, read against the lab’s own range. Members watch these films in the app, beside their own results.
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The film in words
Your report gives each result with its units, and the lab’s range beside it: the results of healthy people, for comparing yours with.
TSH is measured in mU/L, milliunits per litre. Some reports write mIU/L, which is the same unit. Free T4 and free T3 are measured in pmol/L, picomoles per litre.
As a guide, the British Thyroid Foundation gives typical ranges for healthy adults of 0.4 to 4.0 mU/L for TSH, 9 to 25 pmol/L for free T4 and 3.5 to 7.8 pmol/L for free T3.
Lab ranges are only a guide and vary from lab to lab, so each result is read against the range on its own report.
Babies and young children have their own ranges. TSH also naturally rises with age, typically from around 70, and isn’t always a sign of poor health then.
Positive means they’re above the lab’s cut-off. Some people with no thyroid problem have positive antibodies too.
Antibody numbers differ from lab to lab, so each result is read as positive or negative against its own lab’s cut-off, and only results from the same lab are compared as numbers.
Reports from abroad can use other units, such as ng/dL for free T4. Rowe & Wren converts them to UK units.
Sources: British Thyroid Foundation: thyroid function tests; British Thyroid Foundation: subclinical thyroid disease
More films
How your thyroid worksThe gland, its two hormones, and the signal from the brain that runs it.1 min 15
What your blood test showsWhat a usual test looks at, TSH and free T4 side by side, and lab ranges.1 min 31
Hashimoto’s: why the thyroid slows downThe immune system, TPO antibodies, and why the test isn’t repeated.1 min 04
Levothyroxine, and how to take itWhat it does, taking it so it’s absorbed, missed doses, and why changes take time.1 min 41
Still not feeling right?When results are in range but symptoms aren’t, and what to ask your GP.1 min 16
Basic and full thyroid testsWhat TSH, free T4, free T3 and the two antibodies each add.1 min 33
TPO antibodies, in detailWhat a positive result can mean, with or without a thyroid problem, and why it stays.1 min 11
Tg antibodies, in detailThyroglobulin, why it’s watched after thyroid cancer, and what its antibodies change.58 sec
Iron, B12 and vitamin DOther results you may have, why they come up with the thyroid, and coeliac disease.1 min 25
Pregnancy and your thyroidPlanning a pregnancy, the dose and tests in pregnancy, and after the birth.1 min 33
General information, not a diagnosis. Your GP can tell you what your results mean for you.