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Thyroid Health
Our Thyroid Health Blood Test provides a comprehensive assessment of thyroid function by measuring key hormones such as Thyroid Stimulating Hormone (TSH), Free Thyroxine (FT4), and Free Tri-iodothyronine (FT3). Analysing these markers together enables your doctor to determine whether your thyroid is functioning optimally or whether there is evidence of hypothyroidism, hyperthyroidism, or another thyroid disorder. Early detection allows for targeted treatment and ongoing monitoring to restore hormonal balance, support metabolic health, and improve quality of life.
Your doctor may recommend a thyroid health test if you are experiencing symptoms such as fatigue, weight changes, mood swings, hair thinning, dry skin, temperature sensitivity, or changes in heart rate. Regular monitoring is particularly important if you have a family history of thyroid disease, are living with autoimmune conditions such as Hashimoto’s thyroiditis or Graves’ disease, or are taking medication that may affect thyroid function.
Thyroidhormones & antibodies
48 hrsresults turnaround
GPled interpretation
UKASaccredited lab
Why a Thyroid Health test matters
Your thyroid is a small gland with a big job — it sets the pace of your metabolism, affecting your energy, weight, mood, temperature and more. An over- or under-active thyroid is common and easily missed, with symptoms often blamed on stress or simply "getting older." This panel measures your thyroid hormones and antibodies for a complete picture.
The antibodies can reveal an autoimmune cause behind a thyroid problem, and every result is reviewed and explained by a GP, with clear guidance on what it means.
What's included in your Thyroid Health test
Thyroid hormones plus antibodies, for a complete picture.
Thyroid hormones
- Thyroid Stimulating Hormone (TSH) — the pituitary's signal to the thyroid, and the key first-line marker.
- Free T4 (FT4) — the active, unbound form of the main thyroid hormone.
- Free T3 (FT3) — the active, unbound form of the most potent thyroid hormone.
- Total T4 — the total level of thyroxine in your blood.
Thyroid antibodies
- Thyroid Peroxidase Antibodies (Anti-TPO) — can indicate an autoimmune cause, such as Hashimoto's thyroiditis.
- Thyroglobulin Antibodies (Anti-TG) — further antibodies that point to autoimmune thyroid activity.
What your results can indicate
Underactive thyroidTiredness, weight gain or feeling the cold (hypothyroidism).
Overactive thyroidPalpitations, weight loss or feeling too warm (hyperthyroidism).
Autoimmune causeAntibodies that point to conditions such as Hashimoto's or Graves'.
MonitoringKeeping track if you already have a thyroid condition.
Markers reported
TSHFree T4Free T3Anti-TPOAnti-TG
How it works
Book onlineChoose a time that suits you, or call us. Most checks can be booked online.
Quick blood sampleA short, comfortable appointment at one of our clinical sites — around 15 minutes.
Expert lab analysisYour sample is processed by a locally based UKAS-accredited laboratory.
GP-reviewed resultsWithin 48 hours, a GP reviews and explains your results — with clear, personalised advice.
Is this test right for you?
It's a helpful choice if you have:
Low energy or moodTiredness, weight changes or low mood you can't explain.
Temperature or heart symptomsFeeling too hot or cold, or noticing palpitations.
A family historyThyroid problems in close relatives.
A known conditionWanting to monitor an existing thyroid issue.
Why choose Solasta
GP interpretation, not softwareEvery result is reviewed and explained by an experienced local GP — so you know what it means and what to do next.
Accurate, accredited resultsAnalysed by a locally based UKAS-accredited laboratory (ISO/IEC 17025:2017) for reliable, fast diagnostics.
Continuity of careMore than a one-off test — discreet, unhurried care with ongoing support and follow-up if needed.
What to know before your appointment
Biotin (Vitamin B7) — especially important
Biotin is well known to interfere with thyroid tests and can give falsely high or low results. It's found in many multivitamins, hair/skin/nail supplements and standalone products. Unless prescribed by your doctor, stop biotin for at least 48 hours before testing. If it has been prescribed, speak with your doctor before stopping.
Book a morning appointment
TSH is naturally highest in the morning, so a morning slot gives the most reliable and consistent result — particularly useful if you're monitoring a known thyroid condition.
Thyroid medication
If you take thyroid medication (such as levothyroxine), continue as normal — but for monitoring it's often best to have your blood taken before that day's dose. Mention your medication when you book and we'll guide you.
Stay hydrated
Please ensure you are well hydrated prior to your appointment, as being dehydrated may make the blood draw more difficult.
Thyroid Health FAQs
What does this test measure?
Thyroid hormones — TSH, free T4, free T3 and total T4 — plus thyroid antibodies (anti-TPO and anti-TG), which can reveal an autoimmune cause.
Why does biotin matter so much for thyroid tests?
Biotin is known to interfere with the laboratory methods used for thyroid tests and can give falsely high or low results. Stop biotin supplements for at least 48 hours beforehand unless they're prescribed.
Should I take my thyroid medication before the test?
Continue your medication as normal, but for monitoring it's often best to have your blood taken before that day's dose. Let us know what you take and we'll advise.
When should I take the test?
A morning appointment is recommended, as TSH is naturally highest then and gives the most consistent result.
What do the antibodies tell me?
Raised anti-TPO or anti-TG antibodies can point to an autoimmune cause behind a thyroid problem, such as Hashimoto's or Graves' disease. Your GP will interpret this in context.
How long do results take?
Results are typically ready within 48 hours of your sample reaching the laboratory, after which a GP reviews and explains them.
How is the sample taken?
A simple blood sample is taken at one of our clinical sites in a short, comfortable appointment of around 15 minutes.
Related checks & services
Pituitary & AdrenalA wider look at the hormones that regulate your body.
Nutritional HealthVitamins and minerals that support energy and wellbeing.
Well WomanA comprehensive general health check across all the major systems.
Well ManA comprehensive general health check across all the major systems.
Ready to understand your health?
Book your Thyroid Health test online, or call us — NI 028 40 648 486 · ROI +353 1906 1950.
Book your Thyroid Health test online, or call us — NI 028 40 648 486 · ROI +353 1906 1950.